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+<html><head>
+<title>AT Command Reference Manual</title>
+<link href="../../styles.css" rel="stylesheet" type="text/css">
+</head>
+<body class="bodytext">
+<p class="mainsubhead">AT Commands for <br>
+RC288ACx and RC144ACx Modem Families</p>
+
+<p class="subheadlinktext"><b>Reference Manual<br>
+(Preliminary)</b><p>
+ Order No. 1048P<br> Rev. 3, January 31, 1996<p>
+
+<hr>
+<b>
+This document is provided electronically for use for the express
+purpose of assisting software developers and end users answer
+frequently asked questions about Rockwell modem products.
+<p>
+This manual ONLY describes
+the GENERIC Rockwell AT command set. Modem vendors often change,
+add, and delete commands based on their particular product and
+feature set. Thus this document does not necessarily describe the AT
+commands used within your modem, even if it is based on Rockwell
+chipset products. Always consult your modem vendor's documentation
+first.
+</b>
+
+<HR>
+
+<b>NOTICE</b><p>
+Information furnished by Rockwell International Corporation is believed
+to be accurate and reliable. However, no responsibility is assumed by Rockwell
+International for its use, nor any infringement of patents or other rights of
+third parties which may result from its use. No license is granted by
+implication or otherwise under any patent rights of Rockwell International
+other than for circuitry embodied in Rockwell products. Rockwell International
+reserves the right to change circuitry at any time without notice. This
+document is subject to change without notice.<p>
+<p>
+ConfigurACE is a trademark of Rockwell International.<br>MNP is a registered
+trademark of Microcom, Inc. <br>Hayes is a registered trademark of Hayes
+Microcomputer Products, Inc.<p>
+<p>
+<HR>
+<ol>
+<li><a href="#RTFToC1">INTRODUCTION</a>
+<li><a href="#RTFToC8">COMMAND SYNTAX</a>
+ <ul>
+<li><a href="#RTFToC9">2.1 DTE/DCE INTERCHANGE CIRCUITS</a>
+<li><a href="#RTFToC10">2.2 COMMAND SYNTAX AND GUIDELINES</a>
+<li><a href="#RTFToC13">2.3 AT COMMAND GUIDELINES</a>
+ </ul>
+<li><a href="#RTFToC16">AT COMMAND SET</a>
+ <ul>
+<li><a href="#RTFToC17">3.1 AT COMMAND GUIDELINES</a>
+<li><a href="#RTFToC21">3.2 AT COMMAND SET</a>
+ <ul>
+<li><a href="#RTFToC22">3.2.1 AT Commands</a>
+<li><a href="#RTFToC47">3.2.2 AT& Commands</a>
+<li><a href="#RTFToC66">3.2.3 AT% Commands</a>
+<li><a href="#RTFToC70">3.2.4 AT\ Commands</a>
+<li><a href="#RTFToC74">3.2.5 AT+ Commands</a>
+<li><a href="#RTFToC80">3.2.6 AT- Commands</a>
+ </ul>
+<li><a href="#RTFToC83">3.3 ERROR DETECTION AND DATA COMPRESSION COMMANDS</a>
+<li><a href="#RTFToC89">3.4 MNP 10 COMMANDS</a>
+<li><a href="#RTFToC98">3.5 W-CLASS COMMANDS</a>
+<li><a href="#RTFToC102">3.6 CALLER ID COMMANDS</a>
+<li><a href="#RTFToC110">3.7 CELLULAR COMMANDS</a>
+<li><a href="#RTFToC121">3.8 AT COMMAND RESULT CODES</a>
+ </ul>
+<li><a href="#RTFToC177">S-REGISTERS</a>
+ <ul>
+<li><a href="#RTFToC178">4.1 FACTORY DEFAULTS</a>
+<li><a href="#RTFToC179">4.2 S-REGISTER DEFINITIONS</a>
+ </ul>
+<li><a href="#RTFToC228">FAX CLASS 1 COMMANDS</a>
+<li><a href="#RTFToC251">FAX CLASS 2 COMMANDS</a>
+<li><a href="#RTFToC320">VOICE/AUDIO COMMANDS</a>
+ <ul>
+<li><a href="#RTFToC321">7.1 VOICE/AUDIO SUBMODES</a>
+<li><a href="#RTFToC325">7.2 VOICE/AUDIO CAPABILITIES</a>
+<li><a href="#RTFToC357">7.3 AT VOICE COMMAND SUMMARY</a>
+<li><a href="#RTFToC407">7.4 S-REGISTERS </a>
+<li><a href="#RTFToC409">7.5 RESULT CODES FOR VOICE OPERATION</a>
+<li><a href="#RTFToC410">7.6 EXAMPLES OF VOICE OPERATION</a>
+ </ul>
+<li><a href="#RTFToC411">AT COMMAND SET SUMMARY</a>
+ <UL>
+<li><a href="#RTFToC412">8.1 BASIC AT COMMANDS</a>
+<li><a href="#RTFToC413">8.2 ECC COMMANDS</a>
+<li><a href="#RTFToC414">8.3 MNP 10 COMMANDS</a>
+<li><a href="#RTFToC415">8.4 W-CLASS COMMANDS</a>
+<li><a href="#RTFToC416">8.5 CALLER ID COMMANDS</a>
+<li><a href="#RTFToC417">8.6 FAX CLASS 1</a>
+<li><a href="#RTFToC418">8.7 FAX CLASS 2</a>
+<li><a href="#RTFToC419">8.8 VOICE/AUDIO COMMANDS</a>
+<li><a href="#RTFToC420">8.9 CELLULAR COMMANDS</a>
+ </UL>
+<li><a href="#RTFToC421">COMMON CONFIGURATION SETUP STRINGS</a>
+</ol>
+
+<HR>
+<p>
+<b><i>PREFACE</i></b><p>
+This manual supersedes the following manuals:<p>
+1. AT Command Reference Manual for the RC288ACi and RC288ACL Modem Families
+(Order No. 1048, Rev.2, May 5, 1995).<p>
+2. AT Command Reference Manual for the RC144ACi/ATi, RC144ACL/ATL,
+RC144ACF/ATF, RC144ACFL/ATFL, and RC144ACG Modem Families (Order No. 883,
+Rev.3, May 5, 1995).<p>
+This revision includes RC144ACx unique functions. This revision also
+incorporates default value changes to reflect RC288ACi/RC288ACL Firmware
+Version V1.400/V1.410. Major changes included in this revision are summarized
+below.<p>
+1. In Section 1.1, the reference to RHSI was deleted.<p>
+2. In Section 3.2.1, Fn was added for RC144 support.<p>
+3. In Section 3.2.1, J and K were deleted from the Dn command.<p>
+4. In Section 3.2.1, the I3 definition was expanded in the In command.<p>
+5. In Section 3.2.1, the Y1 definition was corrected in the Yn command.<p>
+6. In Section 3.2.2, the &Tn definition was expanded.<p>
+7. In Section 3.2.2, the maximum length of a telephone number that can be
+stored using the &Z command was changed to 34 digits.<p>
+8. In Section 3.2.2, the &Tn default was changed to &T5.<p>
+9. In Section 3.2.4, the \Vn - Single Line Connect Message Enable command was
+added.<p>
+10. In Section 3.2.5, 11 was added to the list of supported modulations in +MS
+command Reporting Supported Options example for 288ACx. The Subparameter
+Definitions for item 2 <automode> were also revised.<p>
+11. In Section 3.2.5, the +H11 definition was added to +Hn command.<p>
+12. In Section 3.4.1, the )Mn command definition was deleted except for command
+response compatibility.<p>
+13. In Section 3.4.1, the *Hn command definition was deleted except for command
+response compatibility.<p>
+14. In Section 3.4.1, the -Kn default value was changed to -K0.<p>
+15. In Section 3.4.1, the -Qn command definition was deleted except for command
+response compatibility.<p>
+16. In Section 3.4.1, the -SEC command definition note was expanded.<p>
+17. In Section 3.4.1, the @Mn command definition was deleted except for command
+response compatibility.<p>
+18. In Section 3.7.3, the definition was revised and expanded.<p>
+19. In Section 4.2, S21 default value was changed to 52 (34h) (to reflect
+&D2 and &C1 selected).<p>
+20. In Section 4.2, S23 default value was changed to 62 (3Dh) (to reflect 38400
+or higher DTE speed).<p>
+21. In Section 4.2, S27 default value was changed to 73 (to reflect B1, Bell
+mode). Bit 2 state 1 was deleted.<p>
+22. In Section 4.2, S28 bits 6-7 were changed to reserved.<p>
+23. In Section 4.2, S29 default value was changed to 70 (to reflect 700 ms).<p>
+24. In Section 4.2, \Vn was added to S31 and S31 default value was changed to
+194 (C2h) (to reflect a constant).<p>
+25. In Section 4.2, S40 default value was changed to 104 (68h) (to reflect -K0,
+Disable extended services). Bit 2 was changed to reserved.<p>
+26. In Section 4.2, S41 default value was changed to 195 (C3h) (to reflect %E2,
+Fallback/Fall forward enabled). Bit 27 was changed to reserved.<p>
+27. In Section 4.2, S201 was deleted.<p>
+28. In Section 5.1.3, the sentence referring to carrier loss for a time period
+longer than the time specified by the register S10 was deleted. S10 does not
+have any affect in fax data reception.<p>
+29. In Section 7 introduction, silence deletion was deleted.<p>
+30. In Section 7.1.2, silence deletion was deleted.<p>
+31. In Section 7.1.3, silence deletion was deleted.<p>
+32. In Section 7.2.3, the reference to RHSI was deleted and, in Table 7-1, the
+0.5 (16-bits) option was deleted.<p>
+33. In Section 7.2.3, Table 7-2, silence deletion was deleted from the
+<DLE>q description.<p>
+34. In Section 7.2.7, the volume ajustment during playback was revised.<p>
+35. In Section 7.3.1, the following paragraph was added to the introduction:
+"All voice commands that can have a value of 0-255 will not respond error if a
+value above 255 is entered; the resulting value will be the value entered minus
+256 or 512, etc."<p>
+36. In Section 7.3.2, #TL command, the result code definition was modified and
+the note for #TL command applicability was added.<p>
+37. In Section 7.3.2, #VBT command, the phrase "via the D command" was
+deleted.<p>
+38. In Section 7.3.2, #VLS command, telephone emulation (#VLS=5) was added to
+the command options and to Table 7-5. <p>
+39. In Section 7.3.2, #VSD command, the #VSD=1 command definition was deleted
+except for command response compatibility.<p>
+40. In Section 7.3.2, #VSP command, description of operation with silence
+deletion was deleted.<p>
+41. In Section 7.3.2, #VSR command, the result code definition was revised to
+delete the operation with #VBS=16.<p>
+42. In Section 7.3.2, #VSS command, the default was changed.<p>
+43. In Section 7.6, Table 7-7, the #VSD=1 command description and reference to
+silence deletion under #VSS=1 command were deleted.<p>
+44. In Section 7.6, Table 7-8, the #VSD=1 command description was deleted.<p>
+45. In Section 7.6, Table 7-9, the #VSD=1 command was deleted, the #VSS=2
+command description was revised, and the #VRX CONNECT description was
+revised.<p>
+46. In Section 7.6, Table 7-10, the #VSS=2 command description and the #VRX
+command CONNECT descriptions were revised.<p>
+47. In Section 7.6, Table 7-11, the #VSS=2 command description was revised and
+the #VSD=1 command was deleted.<p>
+48. In Section 7.6, Table 7-12, the #VSS=2 command description was revised.<p>
+49. In Section 8, the command summary was changed to reflect revised
+commands.<p>
+<p>
+<b><i>Table of Contents</i></b><p>
+<b><i> List of Tables</i></b><p>
+Table 3-1. Result Codes <p>
+Table 3-2. Remote Modem Configuration and Resulting Transmit Levels <p>
+Table 4-1. S-Register Summary <p>
+Table 5-1. Fax Class 1 Commands <p>
+Table 5-2. Fax Class 1 Calling Sequence (One Page) <p>
+Table 5-3. Fax Class 1 Answering Sequence (One Page) <p>
+Table 6-1. Fax Class 2 Commands <p>
+Table 6-2. T.30 Session Subparameter Codes <p>
+Table 6-3. T.30 Post Page Message Codes <p>
+Table 6-4. T.30 Post Page Response Messages <p>
+Table 6-5. Hang Up Status Codes <p>
+Table 6-6. Send Two Pages, 1-D, No Errors <p>
+Table 6-7. Receive Two Pages, 1-D Data, No Errors <p>
+Table 7-1. DTE Speeds <p>
+Table 7-2. Codes Sent to the DTE <p>
+Table 7-3. Shielded DTE Codes <p>
+Table 7-4. AT Voice Commands <p>
+Table 7-5. Device Types Supported by #VLS <p>
+Table 7-6. #VTD Tone Detection/Reporting Bit Settings <p>
+Table 7-7. Record a Greeting Message <p>
+Table 7-8. Playback a Greeting Message <p>
+Table 7-9. Answer Call/Play Greeting/Record Message <p>
+Table 7-10. Call/Record Message/Receive Fax <p>
+Table 7-11. Answer Call, Determine It's a Fax <p>
+Table 7-12. Adaptive Fax/Data/Voice; Determine Data <p>
+Table 7-13. Originate a Call, Send Answerer a Message <p>
+<p>
+<b><i>List of Figures</i></b><p>
+Figure 6-1. T.30 Session Parameter Relationships <p>
+<p>
+<a name="_Toc343068178"></a><a name="_Toc347715434"></a>
+<p class="subheadlinktext">
+<a name="RTFToC1">1.
+INTRODUCTION</a>
+<a name="_Toc343068179"></a><a name="_Toc347715435"></a></p>
+<p class="bodytext"><b>
+<a name="RTFToC2">1.1
+OVERVIEW</a></a>
+</a></b></p>
+This manual describes the AT commands for the following Rockwell modem
+families:<p>
+ RC288ACi <br> RC288ACL<br> RCV288ACi/SP<br> RCV288ACF/SP and RCV288ACF<br>
+RCV288ACi/SVD<br> RCV288ACL/SVD<br><p>
+ RC144ACi and RC144ATi<br> RC144ACL and RC144ATL<br> RC144ACG<br> RC144ACF and
+RC144ATF<br> RC144ACFL and RC144ATFL<br> RCV144ACi/SP<br> RCV144ACF/SP and
+RCV144ACF<p>
+The descriptions apply to all these modems with any differences between modem
+product families noted. Refer to Modem FIrmware Release notes for the exact
+applicable commands to modem firmware.<p>
+ATi, ATL, ATF, and ATFL models support error correction and data compression
+(ECC) performed by the host CPU and communications software for Windows using
+the enhanced Rockwell Windows Protocol Interface (RPI or RPI+(TM)) and WinRPI
+host software module.
+<a name="_Toc343068180"></a><a name="_Toc347715436"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC3">1.1.1
+Command Syntax</a>
+</i></b></p>
+The fundamental DTE interface command syntax is described in Section 2.
+<a name="_Toc343068181"></a><a name="_Toc347715437"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC4">1.1.2
+Command Descriptions</a>
+</i></b></p>
+These commands are grouped into the following categories:<p>
+ AT commands Section 3<br> S-Registers Section 4<br> Fax Class 1 commands
+Section 5<br> Fax Class 2 commands Section 6<br> Voice/Audio commands Section
+7<p>
+The AT commands are implemented in microcontroller (MCU) firmware for specific
+modem models. The support for a command category is identified by modem model
+in the modem designer's guide. Additional configuration and implementation
+information is available in release notes and/or readme files that accompany
+MCU firmware release.
+<a name="_Toc343068182"></a><a name="_Toc347715438"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC5">1.1.3
+Call Progress and Blacklisting Parameters</a>
+</i></b></p>
+The modem MCU firmware may be provided either in reconfigurable form or
+preconfigured form. Consult the specific firmware release notes for exact
+configuration information.<p>
+<b>Reconfigurable Form.</b> The modem MCU firmware can be configured for
+operation in specific countries by the PC-compatible ConfigurACE II program.
+The call progress and blacklisting parameters described in the ConfigurACE II
+User's Manual can be altered and loaded for a number of countries by this
+program. <p>
+<b>Preconfigured Form.</b> Specific MCU firmware configurations may be released
+that can be directly installed without requiring the use of ConfigurACE II.
+<a name="_Toc343068183"></a><a name="_Toc345311432"></a><a name="_Toc347715439"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC6">1.1.4
+ConfigurACE II</a>
+</i></b></p>
+The ConfigurACE II User's Manual describes the use of ConfigurACE II and the
+country modifiable parameters. Consult any readme files accompanying the
+ConfigurACE II program for additional or later information.
+<a name="_Toc343068184"></a><a name="_Toc347715440"></a>
+<p class="bodytext"><b>
+<a name="RTFToC7">1.2
+REFERENCE DOCUMENTATION</a>
+</b></p>
+<b> Order No. Description</b><p>
+ MD86 RC144ACi and RC144ACL Modem Data Sheet<p>
+ MD108 RC144ACG Modem Data Sheet<p>
+ MD95 RC144ATi and RC144ATL Modem Data Sheet<p>
+ MD129 RC144ACF and RC144ATF Modem Data Sheet<p>
+ MD130 RC144ACFL and RC144ATFL Modem Data Sheet<p>
+ MD137 RCV144ACi/SP Modem Data Sheet<p>
+ MD146 RC144ACF/SP and RC144ATF/SP Modem Data Sheet<p>
+ MD127 RC288ACi and RC288ACL Modem Data Sheet<p>
+ MD134 RC288ACi/SVD Integrated V.34 Data/V.17 Fax/Voice/SVD Modem Data Sheet<p>
+ MD150 RC288ACF/SP and RC288ATF/SP Modem Data Sheet<p>
+ MD161 RC288ACL/SVD Modem Data Sheet<p>
+<p>
+ 876 RC144ACi and RC144ACL Modem Designer's Guide<p>
+ 897 RC144ATi and RC144ATL Modem Designer's Guide<p>
+ 1008 RC144ACG Modem Designer's Guide<p>
+ 1055 RC144ACF and RC144ATF Modem Designer's Guide<p>
+ 1046 RC144ACF/SP and RC144ATF Modem Designer's Guide<p>
+ 1027 RC288ACi and RC288ACL Modem Designer's Guide<p>
+ 1046 RC288ACF/SP, RC288ATF/SP, RC144ACF/SP, and RC144ATF/SP Modem Designer's
+Guide<p>
+ 1054 RC288ACi/SVD Modem Designer's Guide<p>
+ 1082 RC144ACF/ASVD and RCV288ACF/ASVD Modem Designer's Guide<p>
+ 1096 RC288ACL/SVD SP Modem Designer's Guide<p>
+<p>
+ 893 ConfigurACE II User's Manual<p>
+<a name="_Toc343068185"></a><a name="_Toc347715441"></a>
+<p class="subheadlinktext">
+<a name="RTFToC8">2. COMMAND SYNTAX</a>
+<a name="_Toc343068186"></a><a name="_Toc347715442"></a></p>
+<p class="bodytext"><b>
+<a name="RTFToC9">2.1
+DTE/DCE INTERCHANGE CIRCUITS</a></a>
+</a></b></p>
+Communication between the DTE and modem is half duplex (i.e., only one entity
+'talks' at a time).
+<a name="_Toc343068187"></a><a name="_Toc347715443"></a>
+<p class="bodytext"><b>
+<a name="RTFToC10">2.2
+COMMAND SYNTAX AND GUIDELINES</a>
+<a name="_Toc343068188"></a><a name="_Toc347715444"></a></b></p>
+<p class="bodytext"><b><i>
+<a name="RTFToC11">2.2.1
+DTE Commands</a></a>
+</a></i></b></p>
+The ISO 646 character set (CCITT T.50 International Alphabet 5, American
+Standard Code for Information Interchange) is used for the issuance of commands
+and responses. Only the low-order 7 bits of each character are used for
+commands or parameters; the high-order bit is ignored. Upper case characters
+are equivalent to lower case characters.
+<a name="_Toc343068189"></a><a name="_Toc347715445"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC12">2.2.2
+DTE Command Lines</a>
+</i></b></p>
+A command line is a string of characters sent from a DTE to the DCE while the
+DCE is in a command state. Command lines have a prefix, a body, and a
+terminator. The prefix consists of the ASCII characters "AT" (065, 084) or "at"
+(097, 116). The body is a string of commands restricted to printable ASCII
+characters (032 - 126). Space characters (ASCII 032) and control characters
+other than carriage return <CR> (default value = ASCII 013 = 0Dh, see
+register S3), backspace <BS> (default value = ASCII 008 = 08h, see
+register S5), and cancel <cntrl-x> (ASCII 024 = 18h) in the command
+string are ignored. The default terminator is the <CR> character.
+Characters that precede the AT prefix are ignored.
+<a name="_Toc343068190"></a><a name="_Toc347715446"></a>
+<p class="bodytext"><b>
+<a name="RTFToC13">2.3
+AT COMMAND GUIDELINES</a>
+</b></p>
+Modem operation is controlled by generic AT commands. These AT commands may be
+basic AT (i.e., commands preceded by AT, AT&, AT%, AT*, AT\, AT), AT-, or
+AT#), S-Register (e.g., S6=n), Fax class 1 (e.g., +FTM), Fax class 2 (e.g.,
++FDCS:), or voice (e.g., #VBS) commands. The command syntax and operation
+guidelines governing each of these command categories are described in
+subsequent sections.
+<a name="_Toc343068191"></a><a name="_Toc347715447"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC14">2.3.1
+Basic Command Syntax</a>
+</i></b></p>
+Characters within the command line are parsed as commands with associated
+parameter values. The basic commands consist of single ASCII characters, or
+single characters preceded by a prefix character, followed by a decimal
+parameter (e.g., "&D1"). Missing decimal parameters are evaluated as 0.
+<a name="_Toc343068192"></a><a name="_Toc347715448"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC15">2.3.2
+Extended Command Syntax</a>
+</i></b></p>
+The facsimile commands use extended syntax. They are preceded by the "+F"
+characters, and they are terminated by the semicolon ":" character (ASCII 059)
+or by the <CR> that terminates the command line.<p>
+
+<a name="_Toc343068193"></a><a name="_Toc347715449"></a>
+<p class="subheadlinktext">
+<a name="RTFToC16">3. AT COMMAND SET</a>
+<a name="_Toc343068194"></a><a name="_Toc347715450"></a></p>
+<p class="bodytext"><b>
+<a name="RTFToC17">3.1
+AT COMMAND GUIDELINES</a></a>
+</a></b></p>
+The basic AT commands used to control modem operation are defined in this
+section. These commands are summarized in Appendix A. All these commands may
+not be available in a specific product depending upon supported data rates and
+modes. The default values are typical of a fully configured modem supporting
+all data rates and options. The actual default value is dependent upon modem
+firmware as defined by the firmware release notes.
+<a name="_Toc343068195"></a><a name="_Toc347715451"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC18">3.1.1
+AT Commands, DTE Adaption</a>
+</i></b></p>
+Under AT operation, the serial interfaced modem performs an
+autobaud/autoparity/autolength function on each AT header entered. The
+autolength/autoparity facility can detect 7- or 8-bit characters of even, odd,
+or no parity with one stop bit. This is not necessary for the parallel
+interfaced modem since it has direct access to the UART registers.
+<a name="_Toc343068196"></a><a name="_Toc347715452"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC19">3.1.2
+AT Command Format</a>
+</i></b></p>
+A command line is a string of characters sent from a DTE to the modem (DCE)
+while the modem is in a command state. A command line has a prefix, a body, and
+a terminator. Each command line (with the exception of the A/ command) must
+begin with the character sequence AT and must be terminated by a carriage
+return. Commands entered in upper case or lower case are accepted, but both the
+A and T must be of the same case, i.e., "AT" = ASCII 065, 084 or "at" = ASCII
+097, 116. The body is a string of commands restricted to printable ASCII
+characters (032 - 126). Space characters (ASCII 032) and control characters
+other than CR (ASCII 013) and BS (ASCII 010) in the command string are ignored.
+The default terminator is the ASCII <CR> character. Characters that
+precede the AT prefix are ignored. The command line interpretation begins upon
+receipt of the carriage return character.<p>
+Characters within the command line are parsed as commands with associated
+parameter values. The basic commands consist of single ASCII characters, or
+single characters preceded by a prefix character (e.g., "&"), followed by a
+decimal parameter. Missing decimal parameters are evaluated as 0. <p>
+The modem supports the editing of command lines by recognizing a backspace
+character. When modem echo is enabled, the modem responds to receipt of a
+backspace or delete by echoing a backspace character, a space character, and
+another backspace. The hex value to be used for the backspace character is
+programmable through register S5. Values equal to 0 or greater than 127, or the
+value which corresponds to the carriage return character, cannot be used for
+the backspace character. This editing is not applicable to the AT header of a
+command. A command line may be aborted at any time by entering < cntrl-x
+> (18h).<p>
+The AT sequence may be followed by any number of commands in sequence, except
+for commands such as Z, D, or A. Commands following commands Z, D, or A on the
+same command line will be ignored. The maximum number of characters on any
+command line is 39 (including "A" and "T"). If a syntax error is found anywhere
+in a command line command, the remainder of the line will be ignored and the
+ERROR result code will be returned.<p>
+Most commands entered with parameters out of range will not be accepted and the
+ERROR response will be returned to the DTE.<p>
+Commands will only be accepted by the modem once the previous command has been
+fully executed, which is normally indicated by the return of an appropriate
+result code. Execution of commands D and A, either as a result of a direct
+command or a re-execute command, will be aborted if another character is
+entered before completion of the handshake.
+<a name="_Toc343068197"></a><a name="_Toc347715453"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC20">3.1.3
+Escape Code Sequence</a>
+</i></b></p>
+When the modem has established a connection and has entered on-line data mode,
+it is possible to break into the data transmission in order to issue further
+commands to the modem in an on-line command mode. This is achieved by the DTE
+sending to the modem a sequence of three ASCII characters specified by register
+S2. The default character is '+'. The maximum time allowed between receipt of
+the last character of the three escape character sequence from the DTE and
+sending of the OK result code to the DTE is controlled by the S12 register.<p>
+<a name="_Toc343068198"></a><a name="_Toc347715454"></a>
+<p class="bodytext"><b>
+<a name="RTFToC21">3.2
+AT COMMAND SET</a>
+</b></p>
+The modem will respond to the commands detailed below. Parameters applicable to
+each command are listed with the command description. The defaults shown for
+each configuration command are those used in the Rockwell factory profile 0.
+<a name="_Toc343068199"></a><a name="_Toc347715455"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC22">3.2.1
+AT Commands</a>
+<a name="_Toc343068200"></a><a name="_Toc347715456"></a></i></b></p>
+<p class="bodytext"><i>
+<a name="RTFToC23">A/
+- Re-execute Command</a></a>
+</a></i></p>
+The modem behaves as though the last command line had been re-sent by the DTE.
+"A/" will repeat all the commands in the command buffer.<p>
+The principal application of this command is to place another call (using the
+Dial command) that failed to connect due to a busy line, no answer, or a wrong
+number. This command must appear alone on a command line. This command should
+not be terminated by a carriage return.
+<a name="_Toc343068201"></a><a name="_Toc347715457"></a>
+<p class="bodytext"><i>
+<a name="RTFToC24">AT=
+x - Write to Selected S-Register</a>
+</i></p>
+This command writes the value x to the currently selected S-Register. An
+S-Register can be selected by using the ATSn command. All of the S-Registers
+will return the OK response if x is a number. Some registers may not be written
+due to country specific PTT limitations.<p>
+Result Codes<p>
+OK For all arguments.
+<a name="_Toc343068202"></a><a name="_Toc347715458"></a>
+<p class="bodytext"><i>
+<a name="RTFToC25">AT?
+- Read Selected S-Register</a>
+</i></p>
+This command reads and displays the selected S-Register. An S-Register can be
+selected by using the ATSn command.<p>
+Result Codes:<p>
+OK For all arguments.
+<a name="_Toc343068203"></a><a name="_Toc347715459"></a>
+<p class="bodytext"><i>
+<a name="RTFToC26">A
+- Answer</a>
+</i></p>
+The modem will go off-hook and attempt to answer an incoming call if correct
+conditions are met. Upon successful completion of answer handshake, the modem
+will go on-line in answer mode. This command may be affected by the state of
+Line Current Sense, if enabled. (Most countries do not require Line Current
+Sense.) Operation is also dependent upon +FCLASS command and country-specific
+requirements.<p>
+If +FCLASS=0 is selected, the modem will enter the connect state after
+exchanging carrier with the remote modem. If no carrier is detected within a
+period specified in register S7, the modem hangs up. Any character entered
+during the connect sequence will abort the connection attempt.<p>
+If +FCLASS=1 or 2 is selected, the modem will go off-hook in V.21 answer mode.
+It will generate the V.21 2100 Hz answer tone for 3 +/- 0.5 seconds and,
+following a delay of 70 ms, will proceed as if the +FTH=3 command were issued.
+At any stage up to (but excluding) the +FTH=3 command state, any character will
+abort the communication. (See the description of the +FTH command for details.)
+<a name="_Toc343068204"></a><a name="_Toc347715460"></a>
+<p class="bodytext"><i>
+<a name="RTFToC27">Bn
+- CCITT or Bell</a>
+</i></p>
+When the modem is configured to allow either option, the modem will select Bell
+or CCITT modulation for a line speed connection of 300 or 1200 bps according to
+the parameter supplied. Any other line speed will use a CCITT modulation
+standard. The parameter value, if valid, is written to S27 bit 6. (Also, see
+ATFn command.)<p>
+B0 Selects CCITT operation at 300 or 1200 bps during Call Establishment and a
+subsequent connection. (Default for W-class models.)<p>
+B1 Selects BELL operation at 300 or 1200 bps during Call Establishment and a
+subsequent connection. (Default for US models.)<p>
+Result Codes:<p>
+OK n = 0 or 1.<p>
+ERROR Otherwise.
+<a name="_Toc343068205"></a><a name="_Toc347715461"></a>
+<p class="bodytext"><i>
+<a name="RTFToC28">Cn
+- Carrier Control</a>
+</i></p>
+This command is included for compatibility only, and has no effect other than
+returning a result code. The only valid parameter is 1.<p>
+Result Codes:<p>
+OK n = 1.<p>
+ERROR Otherwise.
+<a name="_Toc343068206"></a><a name="_Toc347715462"></a>
+<p class="bodytext"><i>
+<a name="RTFToC29">Dn
+- Dial</a>
+</i></p>
+This command directs the modem to go on-line, dial according to the string
+entered and attempt to establish a connection. If no dial string is supplied,
+the modem will go on-line and attempt the handshake in originate mode. In
+W-class models, the action of going off-hook is affected by the status of the
+Line Current Sense input, if line current sensing is enabled, and by the
+blacklist and delayed list. <b>NOTE:</b> If the ATD command is issued before
+the S1 register has cleared, the modem will respond with the NO CARRIER result
+code.<p>
+If +FCLASS=0 is selected, the modem will behave as a data modem and will
+attempt to connect to another data modem. The modem will have up to the period
+of time specified by register S6 or S7 to wait for carrier and complete the
+handshake. If this time expires before the modem can complete the handshake,
+the modem will go on-hook with the NO CARRIER response. This command will be
+aborted in progress upon receipt of any DTE character before completion of the
+handshake.<p>
+If +FCLASS=1 or 2 is selected, the modem will behave as a facsimile modem and
+attempt to connect to a facsimile machine (or modem) by entering the HDLC V.21
+channel 2 receive state (as if +FRH=3 had been issued). This command will be
+aborted upon receipt of any DTE character if the modem has not finished
+dialing. In this case, the modem will go on-hook and return to command mode
+after displaying the NO CARRIER message. If the modem has finished dialing, it
+proceeds as if the +FRH=3 command has been issued. (Refer to the +FRH command
+to determine how the modem behaves following this stage.)<p>
+Dial Modifiers. The valid dial string parameters are described below.
+Punctuation characters may be used for clarity, with parentheses, hyphen, and
+spaces being ignored.<p>
+0-9 DTMF digits 0 to 9.<p>
+* The 'star' digit (tone dialing only).<p>
+# The 'gate' digit (tone dialing only).<p>
+A-D DTMF digits A, B, C, and D. Some countries may prohibit sending of these
+digits during dialing.<p>
+L Re-dial last number: the modem will re-dial the last valid telephone number.
+The L must be immediately after the D with all the following characters
+ignored).<p>
+P Select pulse dialing: pulse dial the numbers that follow until a "T" is
+encountered. Affects current and subsequent dialing. Some countries prevent
+changing dialing modes after the first digit is dialed.<p>
+T Select tone dialing: tone dial the numbers that follow until a "P" is
+encountered. Affects current and subsequent dialing. Some countries prevent
+changing dialing modes after the first digit is dialed.<p>
+R This command will be accepted, but not acted on.<p>
+S=n Dial the number stored in the directory (n = 0 to 3). (See &Z.)<p>
+! Flash: the modem will go on-hook for a time defined by the value of S29.
+Country requirements may limit the time imposed.<p>
+W Wait for dial tone: the modem will wait for dial tone before dialing the
+digits following "W". If dial tone is not detected within the time specified by
+S7 (US) or S6 (W-class), the modem will abort the rest of the sequence, return
+on-hook, and generate an error message.<p>
+@ Wait for silence: the modem will wait for at least 5 seconds of silence in
+the call progress frequency band before continuing with the next dial string
+parameter. If the modem does not detect these 5 seconds of silence before the
+expiration of the call abort timer (S7), the modem will terminate the call
+attempt with a NO ANSWER message. If busy detection is enabled, the modem may
+terminate the call with the BUSY result code. If answer tone arrives during
+execution of this parameter, the modem handshakes.<p>
+& Wait for credit card dialing tone before continuing with the dial string.
+If the tone is not detected within the time specified by S7 (US models) or S6
+(W-class models), the modem will abort the rest of the sequence, return
+on-hook, and generate an error message.<p>
+, Dial pause: the modem will pause for a time specified by S8 before dialing
+the digits following ",".<p>
+; Return to command state. Added to the end of a dial string, this causes the
+modem to return to the command state after it processes the portion of the dial
+string preceding the ";". This allows the user to issue additional AT commands
+while remaining off-hook. The additional AT commands may be placed in the
+original command line following the ";" and/or may be entered on subsequent
+command lines. The modem will enter call progress only after an additional dial
+command is issued without the ";" terminator. Use "H" to abort the dial in
+progress, and go back on-hook.<p>
+^ Toggles calling tone enable/disable: applicable to current dial attempt
+only.<p>
+( ) Ignored: may be used to format the dial string.<p>
+- Ignored: may be used to format the dial string.<p>
+<space> Ignored: may be used to format the dial string.<p>
+<i> Invalid character: will be ignored.<p>
+> If enabled by country specific parameter, the modem will generate a
+grounding pulse on the EARTH relay output.
+<a name="_Toc343068207"></a><a name="_Toc347715463"></a>
+<p class="bodytext"><i>
+<a name="RTFToC30">En
+- Command Echo</a>
+</i></p>
+The modem enables or disables the echo of characters to the DTE according to
+the parameter supplied. The parameter value, if valid, is written to S14 bit
+1.<p>
+E0 Disables command echo.<p>
+E1 Enables command echo. (Default.)<p>
+Result Codes:<p>
+OK n = 0 or 1.<p>
+ERROR Otherwise.
+<a name="_Toc343068208"></a><a name="_Toc347715464"></a>
+<p class="bodytext"><i>
+<a name="RTFToC31">Fn
+- Select Line Modulation (RC144 Models Only)</a>
+</i></p>
+This command selects the line modulation according to the parameter supplied.
+The line modulation is fixed unless Automode is selected. This command
+interacts with the S37 and the N command. The parameter value, if valid, is
+written to S37 bits 0-4. To select line modulation, it is recommended that
+either the F command, or a combination of the S37 and the N command, be used,
+but not both. <p>
+F0 Selects auto-detect mode. Sets N1 and sets S31 bit 1. In this mode, the
+modem configures for automode operation. All connect speeds supported by the
+modem are possible according to the remote modem's preference. The contents of
+S37 are ignored as is the sensed DTE speed.<p>
+F1 Selects V.21 or Bell 103 according to the B setting as the only acceptable
+line speed resulting in a subsequent connection. Sets N0, sets S37 to 1, and
+clears S31 bit 1. This command is equivalent to the command string:
+ATN0S37=1.<p>
+F2 Not supported.<p>
+F3 Selects V.23 as the only acceptable line modulation for a subsequent
+connection. Originator is at 75 bps and answerer is at 1200 bps. Sets N0, sets
+S37 to 7, and clears S31 bit 1. This command is equivalent to the command
+string: ATN0S37=7.<p>
+F4 Selects V.22 1200 or Bell 212A according to the B command setting as the
+only acceptable line speed for a subsequent connection. Sets N0, sets S37 to 5,
+and clears S31 bit 1. This command is equivalent to the command string:
+ATN0S37=5.<p>
+F5 Selects V.22 bis as the only acceptable line modulation for a subsequent
+connection. Sets N0, sets S37 to 6, and clears S31 bit 1. This command is
+equivalent to the command string: ATN0S37=6.<p>
+F6 Select V.32 bis 4800 or V.32 4800 as the only acceptable line modulation for
+a subsequent connection. Sets N0, sets S37 to 8, and clears S31 bit 1. This
+command is equivalent to the command string: ATN0S37=8.<p>
+F7 Selects V.32 bis 7200 as the only acceptable line modulation for a
+subsequent connection. Sets N0, sets S37 to 12, and clears S31 bit 1. This
+command is equivalent to the command string: ATN0S37=12.<p>
+ This setting also allows connection at the Rockwell proprietary 7200 V.32
+speed, e.g., with a RC9696/12 based modem.<p>
+F8 Selects V.32 bis 9600 or V.32 9600 as the only acceptable line modulations
+for a subsequent connection. Sets N0, sets S37 to 9, and clears S31 bit 1. This
+command is equivalent to the command string: ATN0S37=9.<p>
+F9 Selects V.32 bis 12000 as the only acceptable line modulation for a
+subsequent connection. Sets N0, sets S37 to 10, and clears S31 bit 1. This
+command is equivalent to the command string: ATN0S37=10.<p>
+ This setting also allows connection at the Rockwell proprietary 12000 V.32
+speed, e.g., with a RC9696/12 based modem.<p>
+F10 Selects V.32 bis 14400 as the only acceptable line modulation for a
+subsequent connection. Sets N0, sets S37 to 11, and clears S31 bit 1. This
+command is equivalent to the command string: ATN0S37=11.
+<a name="_Toc347715465"></a>
+<p class="bodytext"><i>
+<a name="RTFToC32">Hn
+- Disconnect (Hang-Up)</a>
+</i></p>
+This command initiates a hang up sequence.<p>
+This command may not be available for some countries due to PTT restrictions.<p>
+H0 The modem will release the line if the modem is currently on-line, and will
+terminate any test (AT&T) that is in progress. Country specific, modulation
+specific, and error correction protocol specific (S38) processing is handled
+outside of the H0 command.<p>
+H1 If on-hook, the modem will go off-hook and enter command mode. For US
+models, the modem will remain off-hook. For W-class models, the modem will
+return on-hook after a period of time determined by S7.<p>
+Result Codes:<p>
+OK n = 0 or 1.<p>
+ERROR Otherwise.
+<a name="_Toc343068209"></a><a name="_Toc347715466"></a>
+<p class="bodytext"><i>
+<a name="RTFToC33">In
+- Identification</a>
+</i></p>
+The modem reports to the DTE the requested result according to the command
+parameter.<p>
+I0 Reports product code. Example: 28800<p>
+I1 Calculates the ROM checksum and reports the least significant byte of the
+checksum in decimal (see firmware release notes). Reports 255 if the prestored
+checksum value is FFh.<p>
+I2 Calculates the ROM checksum and compares it with the prestored checksum.
+Reports "OK" if the calculated checksum equals the prestored checksum or if the
+prestored checksum value is FFh; otherwise reports "ERROR".<p>
+I3 Reports the firmware version (F), basic model (e.g.,V34), application code
+(A), and interface type code (I) typically in the form VF.FFF-V34_AI. The
+application codes are: D = Desktop, L = Low Power (PCMCIA). The interface type
+codes are: S = Serial, P = Parallel. Example: V1.400-V34_DS<p>
+ Note: If RPI+ is supported, "ROCKWELL RPI (TM)" is appended.<p>
+I4 Reports OEM defined identifier string in either Hayes-compatible binary
+format (default) or ASCII format (selectable by ConfigurACE). Example: RC288ACi
+(ASCII)<p>
+I5 Reports Country Code parameter. Example: 022<p>
+I6 Reports modem data pump model and internal code revision. Example: RC288DPi
+Rev 05BA<p>
+I7 Reports the DAA code resulting from MCU interrogation of the DAA for auto
+DAA recognition. Examples: 000 for US or Canada, 016 for Japan, 033 for
+Belgium, 034 for Finland, 035 for France, 037 for Italy, 038 for Netherlands,
+039 for Sweden, 040 for Switzerland, and 041 for UK.<p>
+Result Codes:<p>
+OK n = 0 to 7.<p>
+ERROR Otherwise.
+<a name="_Toc343068210"></a><a name="_Toc347715467"></a>
+<p class="bodytext"><i>
+<a name="RTFToC34">Ln
+- Speaker Volume</a>
+</i></p>
+The modem sets the speaker volume control according to the parameter supplied.
+The parameter value, if valid, is written to S22 bits 0 and 1.<p>
+L0 Low volume.<p>
+L1 Low volume. (Default.)<p>
+L2 Medium volume.<p>
+L3 High volume.<p>
+Result Codes:<p>
+OK n = 0 to 3.<p>
+ERROR Otherwise.
+<a name="_Toc343068211"></a><a name="_Toc347715468"></a>
+<p class="bodytext"><i>
+<a name="RTFToC35">Mn
+- Speaker Control</a>
+</i></p>
+This command selects when the speaker will be on or off. The parameter value,
+if valid, is written to S22 bits 2 and 3.<p>
+M0 Speaker is always off.<p>
+M1 Speaker is on during call establishment, but off when receiving carrier.
+(Default.)<p>
+M2 Speaker is always on.<p>
+M3 Speaker is off when receiving carrier and during dialing, but on during
+answering.<p>
+Result Codes:<p>
+OK n = 0 to 3.<p>
+ERROR Otherwise.
+<a name="_Toc343068212"></a><a name="_Toc347715469"></a>
+<p class="bodytext"><i>
+<a name="RTFToC36">Nn
+- Automode Enable</a>
+</i></p>
+This command enables or disables automode detection. The parameter value, if
+valid, is written to S31 bit 1.<p>
+N0 Automode detection is disabled (equivalent to setting the +MS
+<automode> subparameter to 0). A subsequent handshake will be conducted
+according to the contents of S37 or, if S37 is zero, according to the most
+recently sensed DTE speed.<p>
+N1 Automode detection is enabled (equivalent to setting the +MS
+<automode> subparameter to 1). A subsequent handshake will be conducted
+according the automode algorithm supported by the modem, e.g., according to the
+contents of S37 or, if S37 is zero, starting at 28800 bps V.34 (RC288). This
+command is also equivalent to F0 (RC144). (Default.)<p>
+Result Codes:<p>
+OK n = 0 or 1.<p>
+ERROR Otherwise.<p>
+<b>Notes: </b><p>
+1. The Nn and S37=x commands override the +MS command settings. When the
+N0 or N1 command is issued, the +MS subparameters are updated to reflect the Nn
+and S37 values (see +MS command and S37 register). For example:<p>
+N1S37=10 updates the +MS command subparameters to reflect +MS=10,1,300,12000<p>
+N0S37=10 updates the +MS command subparameters to reflect
++MS=10,0,12000,12000<p>
+2. Use of the +MS command is recommended instead of the Nn and S37=x commands.
+Nn and S37=x commands are supported for compatibility with existing
+communication software.
+<a name="_Toc343068213"></a><a name="_Toc347715470"></a>
+<p class="bodytext"><i>
+<a name="RTFToC37">On
+- Return to On-Line Data Mode</a>
+</i></p>
+This command determines how the modem will enter the on-line data mode. If the
+modem is in the on-line command mode, the enters the on-line data mode with or
+without a retrain. If the modem is in the off-line command mode (no
+connection), ERROR is reported.<p>
+O0 Enters on-line data mode without a retrain. Handling is determined by the
+Call Establishment task. Generally, if a connection exists, this command
+connects the DTE back to the remote modem after an escape (+++).<p>
+O1 Enters on-line data mode with a retrain before returning to on-line data
+mode.<p>
+Result Codes:<p>
+OK n = 0 or 1 and a connection exists.<p>
+ERROR Otherwise or if not connected.
+<a name="_Toc343068214"></a><a name="_Toc347715471"></a>
+<p class="bodytext"><i>
+<a name="RTFToC38">P
+- Set Pulse Dial Default</a>
+</i></p>
+This command forces pulse dialing until the next T dial modifier or T command
+is received. Sets S14 bit 5.<p>
+As soon as a dial command is executed which explicitly specifies the dialing
+mode for that particular call (e.g., ATDT...), this command is overridden so
+that all future dialing will be tone dialed. (See T command.)<p>
+This command may not be permitted in some countries.<p>
+Result Code:<p>
+OK
+<a name="_Toc343068215"></a><a name="_Toc347715472"></a>
+<p class="bodytext"><i>
+<a name="RTFToC39">Qn
+- Quiet Results Codes Control</a>
+</i></p>
+The command enables or disables the sending of result codes to the DTE
+according to the parameter supplied. The parameter value, if valid, is written
+to S14 bit 2.<p>
+Q0 Enables result codes to the DTE. (Default.)<p>
+Q1 Disables result codes to the DTE.<p>
+Result Codes:<p>
+OK n = 0 or 1.<p>
+ERROR Otherwise.
+<a name="_Toc343068216"></a><a name="_Toc347715473"></a>
+<p class="bodytext"><i>
+<a name="RTFToC40">Sn
+- Read/Write S-Register</a>
+</i></p>
+The modem selects an S-Register, performs an S-Register read or write function,
+or reports the value of an S-Register.<p>
+n Establishes S-Register n as the last register accessed.<p>
+n=v Sets S-Register n to the value v.<p>
+n? Reports the value of S-Register n.<p>
+The parameter n can be omitted, in which case the last S-Register accessed will
+be assumed. The S can be omitted for AT= and AT?, in which case the last
+S-Register accessed will be assumed.<p>
+For example:<p>
+ ATS7 establishes S7 as the last accessed register.<p>
+ AT=40 sets the contents of the last register accessed to 40.<p>
+ ATS=20 sets the contents of the last register accessed to 20.<p>
+If the number "n" is beyond the range of the S-Registers available, the modem
+will return the ERROR message. The value "v" is "MOD"ed with 256. If the result
+is outside the range permitted for a given S-Register the values will still be
+stored, but functionally the lower and higher limits will be observed. Input
+and output are always in decimal format. Note that some S-Registers are
+read-only.<p>
+In some cases, writing to the S-Register will appear to be accepted but the
+value will not actually be written.<p>
+Due to country restrictions, some commands will be accepted, but the value may
+be limited and replaced by a maximum or minimum value.<p>
+Minimum, maximum, and default values for S-Registers may be altered with
+ConfigurACE.
+<a name="_Toc343068217"></a><a name="_Toc347715474"></a>
+<p class="bodytext"><i>
+<a name="RTFToC41">T
+- Set Tone Dial Default</a>
+</i></p>
+This command forces DTMF dialing until the next P dial modifier or P command is
+received. The modem will set an S-Register bit to indicate that all subsequent
+dialing should be conducted in tone mode. Note that the DP command will
+override this command. Clears S14 bit 5.<p>
+This command may not be permitted in some countries. (See P.)<p>
+Result Code:<p>
+OK
+<a name="_Toc343068218"></a><a name="_Toc347715475"></a>
+<p class="bodytext"><i>
+<a name="RTFToC42">Vn
+- Result Code Form</a>
+</i></p>
+This command selects the sending of short-form or long-form result codes to the
+DTE. The parameter, if valid, is written to S14 bit 3.<p>
+V0 Enables short-form (terse) result codes. Line feed is not issued before a
+short-form result code.<p>
+V1 Enables long-form (verbose) result codes. (Default.)<p>
+Result Codes:<p>
+OK n = 0 or 1.<p>
+ERROR Otherwise.
+<a name="_Toc343068219"></a><a name="_Toc347715476"></a>
+<p class="bodytext"><i>
+<a name="RTFToC43">Wn
+- Connect Message Control</a>
+</i></p>
+This command controls the format of CONNECT messages. The parameter value, if
+valid, is written to S31 bits 2 and 3. Note that the Wn command can be
+overridden by register S95 bits (see S95 description).<p>
+W0 Upon connection, the modem reports only the DTE speed (e.g., CONNECT 19200).
+Subsequent responses are disabled. (Default.)<p>
+W1 Upon connection, the modem reports the line speed, the error correction
+protocol, and the DTE speed, respectively. Subsequent responses are disabled.<p>
+W2 Upon connection, the modem reports the DCE speed (e.g., CONNECT 14400).
+Subsequent responses are disabled.<p>
+Result Codes:<p>
+OK n = 0, 1, or 2.<p>
+ERROR Otherwise.
+<a name="_Toc343068220"></a><a name="_Toc347715477"></a>
+<p class="bodytext"><i>
+<a name="RTFToC44">Xn
+- Extended Result Codes:</a>
+</i></p>
+This command selects which subset of the result messages will be used by the
+modem to inform the DTE of the results of commands.<p>
+Blind dialing is enabled or disabled by country parameters. If the user wishes
+to enforce dial tone detection, a "W" can be placed in the dial string (see D
+command). Note that the information below is based upon the default
+implementation of the X results table. Table 3-1 indicates the messages which
+are enabled for each X value.<p>
+If the modem is in facsimile mode (+FCLASS=1 or 2), the only message sent to
+indicate a connection is CONNECT without a speed indication.<p>
+X0 Disables monitoring of busy tones unless forced otherwise by country
+requirements; send only OK, CONNECT, RING, NO CARRIER, ERROR, and NO ANSWER
+result codes. Blind dialing is enabled/disabled by country parameters. If busy
+tone detection is enforced and busy tone is detected, NO CARRIER will be
+reported. If dial tone detection is enforced or selected and dial tone is not
+detected, NO CARRIER will be reported instead of NO DIAL TONE. The value 000b
+is written to S22 bits 6, 5, and 4, respectively.<p>
+X1 Disables monitoring of busy tones unless forced otherwise by country
+requirements; send only OK, CONNECT, RING, NO CARRIER, ERROR, NO ANSWER, and
+CONNECT XXXX (XXXX = rate). Blind dialing enabled/disabled by country
+parameters. If busy tone detection is enforced and busy tone is detected, NO
+CARRIER will be reported instead of BUSY. If dial tone detection is enforced or
+selected and dial tone is not detected, NO CARRIER will be reported instead of
+NO DIAL TONE. The value 100b is written to S22 bits 6, 5, and 4,
+respectively.<p>
+X2 Disables monitoring of busy tones unless forced otherwise by country
+requirements; send only OK, CONNECT, RING, NO CARRIER, ERROR, NO DIALTONE, NO
+ANSWER, and CONNECT XXXX. If busy tone detection is enforced and busy tone is
+detected, NO CARRIER will be reported instead of BUSY. If dial tone detection
+is enforced or selected and dial tone is not detected, NO DIAL TONE will be
+reported instead of NO CARRIER. The value 101b is written to S22 bits 6, 5, and
+4, respectively.<p>
+X3 Enables monitoring of busy tones; send only OK, CONNECT, RING, NO CARRIER,
+ERROR, NO ANSWER, and CONNECT XXXX. Blind dialing is enabled/disabled by
+country parameters. If dial tone detection is enforced and dial tone is not
+detected, NO CARRIER will be reported. The value 110b is written to S22 bits 6,
+5, and 4, respectively.<p>
+X4 Enables monitoring of busy tones; send all messages. The value 111b is
+written to S22 bits 6, 5, and 4, respectively. (Default.)<p>
+Result Codes:<p>
+OK n = 0 to 4.<p>
+ERROR Otherwise.
+<a name="_Ref345291496"></a><a name="_Toc347715837"></a><p>
+<b>Table 3-1. Result Codes</b>
+
+<pre>
+Short Form Long Form n Value in ATXn Command Notes
+ 0 1 2 3 4
+ 0 OK x x x x x
+ 1 CONNECT x x x x x
+ 2 RING x x x x x
+ 3 NO CARRIER x x x x x
+ 4 ERROR x x x x x
+ 5 CONNECT 1200 1 x x x x
+ 6 NO DIALTONE 3 3 x x x
+ 7 BUSY 3 3 3 x x
+ 8 NO ANSWER x x x x x
+ 9 CONNECT 0600 1 x x x x
+ 10 CONNECT 2400 1 x x x x
+ 11 CONNECT 4800 1 x x x x
+ 12 CONNECT 9600 1 x x x x
+ 13 CONNECT 7200 1 x x x x
+ 14 CONNECT 12000 1 x x x x
+ 15 CONNECT 14400 1 x x x x
+ 16 CONNECT 19200 1 x x x x
+ 17 CONNECT 38400 1 x x x x
+ 18 CONNECT 57600 1 x x x x
+ 19 CONNECT 115200 1 x x x x
+ 22 CONNECT 75TX/1200RX 1 x x x x
+ 23 CONNECT 1200TX/75RX 1 x x x x
+ 24 DELAYED 4 4 4 4 x
+ 32 BLACKLISTED 4 4 4 4 x
+ 33 FAX x x x x x
+ 35 DATA x x x x x
+ 40 CARRIER 300 x x x x x
+ 44 CARRIER 1200/75 x x x x x
+ 45 CARRIER 75/1200 x x x x x
+ 46 CARRIER 1200 x x x x x
+ 47 CARRIER 2400 x x x x x
+ 48 CARRIER 4800 x x x x x
+ 49 CARRIER 7200 x x x x x
+ 50 CARRIER 9600 x x x x x
+ 51 CARRIER 12000 x x x x x
+ 52 CARRIER 14400 x x x x x
+ 53 CARRIER 16800 x x x x x RC288
+ only
+ 54 CARRIER 19200 x x x x x RC288
+ only
+ 55 CARRIER 21600 x x x x x RC288
+ only
+ 56 CARRIER 24000 x x x x x RC288
+ only
+ 57 CARRIER 26400 x x x x x RC288
+ only
+ 58 CARRIER 28800 x x x x x RC288
+ only
+ 59 CONNECT 16800 1 x x x x RC288
+ only
+ 61 CONNECT 21600 1 x x x x RC288
+ only
+ 62 CONNECT 24000 1 x x x x RC288
+ only
+ 63 CONNECT 26400 1 x x x x RC288
+ only
+ 64 CONNECT 28800 1 x x x x RC288
+ only
+ 66 COMPRESSION: CLASS 5 x x x x x
+ 67 COMPRESSION: V.42 bis x x x x x
+ 69 COMPRESSION: NONE x x x x x
+ 76 PROTOCOL: NONE x x x x x
+ 77 PROTOCOL: LAPM x x x x x
+ 80 PROTOCOL: ALT x x x x x
+ 81 PROTOCOL: ALT-CELLULAR x x x x x
+ +F4 +FCERROR x x x x x
+Note: An 'x' in a column indicates that the message (either the long form if
+verbose, or the value only for short form) will be generated when that
+particular value of 'n' (shown at the top of the column) has been selected by
+the use of ATXn. If the column is blank, then no message will be generated for
+that x option. A numeral indicates which less explicit message (verbose or
+short form) will be output for that X option. (Also, see Section 3.3).
+<a name="_Toc343068221"></a><a name="_Toc347715478"></a>
+</pre>
+<p class="bodytext"><i>
+<a name="RTFToC45">Yn
+- Long Space Disconnect</a></a>
+</a></i></p>
+This command enables/disables the generation and response to long space
+disconnect. The parameter value, if valid, is written to S21 bit 7.<p>
+Y0 Disables long space disconnect. (default.)<p>
+Y1 Enables long space disconnect. In non-error correction mode, the modem will
+send a long space of four seconds prior to going on-hook. In non-error
+correction mode, the modem will respond to the receipt of a long space (i.e., a
+break signal greater than 1.6 seconds) by going on-hook.<p>
+Result Codes:<p>
+OK n = 0 or 1.<p>
+ERROR Otherwise.
+<a name="_Toc343068222"></a><a name="_Toc347715479"></a>
+<p class="bodytext"><i>
+<a name="RTFToC46">Zn
+- Soft Reset and Restore Profile</a>
+</i></p>
+The modem performs a soft reset and restores (recalls) the configuration
+profile according to the parameter supplied. If no parameter is specified, zero
+is assumed.<p>
+Z0 Soft reset and restore stored profile 0.<p>
+Z1 Soft reset and restore stored profile 1.<p>
+Result Codes:<p>
+OK n = 0 or 1.<p>
+ERROR Otherwise.
+<a name="_Toc343068223"></a><a name="_Toc347715480"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC47">3.2.2
+AT& Commands</a>
+<a name="_Toc343068224"></a><a name="_Toc347715481"></a></i></b></p>
+<p class="bodytext"><i>
+<a name="RTFToC48">&Cn
+- RLSD (DCD) Option</a></a>
+</a></i></p>
+The modem controls the RLSD output in accordance with the parameter supplied.
+The parameter value, if valid, is written to S21 bit 5.<p>
+&C0 RLSD remains ON at all times. <p>
+&C1 RLSD follows the state of the carrier. (Default.)<p>
+Result Codes:<p>
+OK n = 0 or 1.<p>
+ERROR Otherwise.
+<a name="_Toc343068225"></a><a name="_Toc347715482"></a>
+<p class="bodytext"><i>
+<a name="RTFToC49">&Dn
+- DTR Option</a>
+</i></p>
+This command interprets the ON to OFF transition of the DTR signal from the DTE
+in accordance with the parameter supplied. The parameter value, if valid, is
+written to S21 bits 3 and 4. Also, see S25.<p>
+&D0 - DTR drop is interpreted according to the current &Qn setting as
+follows:<p>
+&Q0, &Q5, &Q6 DTR is ignored (assumed ON). Allows operation with
+DTEs which do not provide DTR.<p>
+&Q1, &Q4 DTR drop causes the modem to hang up. Auto-answer is not
+affected.<p>
+&Q2, &Q3 DTR drop causes the modem to hang up. Auto-answer is
+inhibited.<p>
+&D1 DTR drop is interpreted according to the current &Qn setting as
+follows:<p>
+&Q0, &Q1, &Q4, &Q5, &Q6 DTR drop is interpreted by the
+modem as if the asynchronous escape sequence had been entered. The modem
+returns to asynchronous command state without disconnecting.<p>
+&Q2, &Q3 DTR drop causes the modem to hang up. Auto-answer is
+inhibited.<p>
+&D2 DTR drop is interpreted according to the current &Qn setting as
+follows:<p>
+&Q0 through &Q6 DTR drop causes the modem to hang up. Auto-answer is
+inhibited. (Default.)<p>
+&D3 DTR drop is interpreted according to the current &Qn setting as
+follows:<p>
+&Q0, &Q1, &Q4, &Q5, &Q6 DTR drop causes the modem to
+perform a soft reset as if the Z command were received. The &Y setting
+determines which profile is loaded.<p>
+&Q2, &Q3 DTR drop causes the modem to hang up. Auto-answer is
+inhibited.<p>
+If &Q5, &Q6, +FCLASS=1 or +FCLASS=2 is in effect, the action taken is
+the same as for &Q0.
+<a name="_Toc343068226"></a><a name="_Toc347715483"></a>
+<p class="bodytext"><i>
+<a name="RTFToC50">&Fn
+- Restore Factory Configuration (Profile)</a>
+</i></p>
+The modem loads the factory default configuration (profile). The factory
+defaults are identified for each command and in the S-Register descriptions. A
+configuration (profile) consists of a subset of S-Registers.<p>
+&F0 Restore factory configuration 0.<p>
+&F1 Restore factory configuration 1.<p>
+Result Codes:<p>
+OK <p>
+ERROR If the modem is connected.
+<a name="_Toc343068227"></a><a name="_Toc347715484"></a>
+<p class="bodytext"><i>
+<a name="RTFToC51">&Gn
+- Select Guard Tone</a>
+</i></p>
+The modem generates the guard tone selected by this command according to the
+parameter supplied (DPSK modulation modes only). The parameter value, if valid,
+is written to S23 bits 6 and 7.<p>
+&G0 Disables guard tone. (Default for US models.)<p>
+&G1 Disables guard tone.<p>
+&G2 Selects 1800 Hz guard tone. (Default for W-class models.)<p>
+This command may not be permitted in some countries.<p>
+Result Codes:<p>
+OK n = 0 to 2.<p>
+ERROR Otherwise.
+<a name="_Toc343068228"></a><a name="_Toc347715485"></a>
+<p class="bodytext"><i>
+<a name="RTFToC52">&Jn
+- Telephone Jack Control</a>
+</i></p>
+This command is included only for compatibility and performs no function except
+to load the S-Register. The parameter value, if valid, is written S21 bit 1.<p>
+&J0 &J0 command. (Default.)<p>
+&J1 &J1 command.<p>
+Result Codes:<p>
+OK n = 0 or 1.<p>
+ERROR Otherwise.
+<a name="_Toc343068229"></a><a name="_Toc347715486"></a>
+<p class="bodytext"><i>
+<a name="RTFToC53">&Kn
+- Flow Control</a>
+</i></p>
+This command defines the DTE/DCE (terminal/modem) flow control mechanism. The
+parameter value, if valid, is written to S39 bits 0, 1, and 2.<p>
+&K0 Disables flow control.<p>
+&K3 Enables RTS/CTS flow control. (Default for data modem modes.)<p>
+&K4 Enables XON/XOFF flow control.<p>
+&K5 Enables transparent XON/XOFF flow control.<p>
+&K6 Enables both RTS/CTS and XON/XOFF flow control. (Default for fax modem
+and voice modes.)<p>
+Result Codes:<p>
+OK n = 0, 3, 4, 5, or 6.<p>
+ERROR Otherwise.
+<a name="_Toc343068230"></a><a name="_Toc347715487"></a>
+<p class="bodytext"><i>
+<a name="RTFToC54">&Ln
+- Leased Line Operation</a>
+</i></p>
+This command requests leased line or dial-up operation. This command is
+provided for compatibility only; no mode change is performed, dial-up operation
+continues. The OK response is returned for a valid parameter, but no other
+action is performed. The parameter value, if valid, is written to S27 bit 2.<p>
+&L0 Requests dial-up operation. Dial-up operation continues.<p>
+Result Codes:<p>
+OK n = 0.<p>
+ERROR Otherwise.
+<a name="_Toc343068231"></a><a name="_Toc347715488"></a>
+<p class="bodytext"><i>
+<a name="RTFToC55">&Mn
+- Asynchronous/Synchronous Mode Selection</a>
+</i></p>
+This command determines the DTR operating mode. The modem treats the &M
+command as a subset of the &Q command.<p>
+&M0 Selects direct asynchronous operation. Note that the command sequence
+&M0\N0 selects normal buffered mode, but the command sequence \N0&M0
+selects direct mode. This is because the \N0 command is analogous to the
+&Q6 command. The value 000b is written to S27 bits 3, 1, and 0,
+respectively. (See &Q).<p>
+&M1 Selects synchronous connect mode with async off-line command mode. The
+value 001b is written to S27 bits 3, 1, and 0, respectively. (Serial interface
+operation only.)<p>
+&M2 Selects synchronous connect mode with async off-line command mode. Same
+as &M1 except that &M2 enables DTR dialing of directory slot 0. The
+modem will disconnect if DTR is OFF for more than the period in S25 (in units
+of hundredths of a second): the data connection will be synchronous. The value
+010b is written to S27 bits 3, 1, and 0, respectively. (Serial interface
+operation only.)<p>
+&M3 Selects synchronous connect mode. This mode allows DTR to act as a
+talk/data switch. The call is manually initiated while DTR is inactive. When
+DTR becomes active, the handshake proceeds in originate or answer mode
+according to S14 bit 7. The value 011b is written to S27 bits 3, 1, and 0,
+respectively. (Serial interface operation only.)<p>
+Result Codes:<p>
+OK n = 0 to 3.<p>
+ERROR Otherwise.
+<a name="_Toc343068232"></a><a name="_Toc347715489"></a>
+<p class="bodytext"><i>
+<a name="RTFToC56">&Pn
+- Select Pulse Dial Make/Break Ratio</a>
+</i></p>
+This command determines the make/break ratio used during pulse dialing. It is
+only effective if the appropriate bit to enable this command is set through the
+ConfigurACE program. If enabled, it will override the make/break ratios in the
+OEM parameters in ConfigurACE. The default is country-dependent. The parameter
+value, if valid, is written to S28 bits 3 and 4.<p>
+&P0 Selects 39%-61% make/break ratio at 10 pulses per second. (Default.)<p>
+&P1 Selects 33%-67% make/break ratio at 10 pulses per second.<p>
+&P2 Selects 39%-61% make/break ratio at 20 pulses per second.<p>
+&P3 Selects 33%-67% make/break ratio at 20 pulses per second.<p>
+Result Codes:<p>
+OK n = 0 to 3.<p>
+ERROR Otherwise.
+<a name="_Toc343068233"></a><a name="_Toc347715490"></a>
+<p class="bodytext"><i>
+<a name="RTFToC57">&Qn
+- Sync/Async Mode</a>
+</i></p>
+This command is an extension of the &M command and is used to control the
+connection modes permitted. It is used in conjunction with S36 and S48. (Also,
+see \N.) <p>
+<b>NOTE:</b> When the &Q0 to &Q4 command is issued to select the mode,
+the subsequent connect message will report the DCE speed regardless of the W
+command and S95 settings.<p>
+&Q0 Selects direct asynchronous operation. The value 000b is written to S27
+bits 3, 1, and 0, respectively. See &M0.<p>
+&Q1 Selects synchronous connect mode with async off-line command mode. The
+value 001b is written to S27 bits 3, 1, and 0, respectively. See &M1.
+(Serial interface operation only.)<p>
+&Q2 Selects synchronous connect mode with async off-line command mode and
+enables DTR dialing of directory 0. The value 010b is written to S27 bits 3, 1,
+and 0, respectively. See &M2. (Serial interface operation only.)<p>
+&Q3 Selects synchronous connect mode with async off-line command mode and
+enables DTR to act as Talk/Data switch. The value 011b is written to S27 bits
+3, 1, and 0, respectively. See &M3. (Serial interface operation only.)<p>
+&Q4 Selects AutoSync operation. The value 100b is written to S27 bits 3, 1,
+and 0, respectively. <p>
+ AutoSync operation, when used in conjunction with the Hayes Synchronous
+Interface (HSI) capability in the DTE, provides synchronous communication
+capability from an asynchronous terminal. <p>
+ <b>Starting AutoSync.</b> Set registers S19, S20, and S25 to the desired
+values before selecting AutoSync operation with &Q4. After the CONNECT
+message is issued, the modem waits the period of time specified by S25 before
+examining DTR. If DTR is on, the modem enters the synchronous operating state;
+if DTR is off, the modem terminates the line connection and returns to the
+asynchronous command state.<p>
+ <b>Stopping AutoSync. </b>AutoSync operation is stopped upon loss<b> </b>of
+carrier or the on-to-off transition of DTR. Loss of carrier will cause the
+modem to return to the asynchronous command state. An on-to-off transition of
+DTR will cause the modem to return to the asynchronous command state and either
+not terminate the line connection (&D1 active) or terminate the line
+connection (any other &Dn command active).<p>
+&Q5 The modem will try to negotiate an error-corrected link. The modem can
+be configured using S36 to determine whether a failure will result in the modem
+returning on-hook or will result in fallback to an asynchronous connection. The
+value 101b is written to S27 bits 3, 1, and 0, respectively. (Default.)<p>
+&Q6 Selects asynchronous operation in normal mode (speed buffering). The
+value 110b is written to S27 bits 3, 1, and 0, respectively.<p>
+Result Codes:<p>
+OK n = 0 to 6.<p>
+ERROR Otherwise.
+<a name="_Toc343068234"></a><a name="_Toc347715491"></a>
+<p class="bodytext"><i>
+<a name="RTFToC58">&Rn
+- RTS/CTS Option</a>
+</i></p>
+This selects how the modem controls CTS. CTS operation is modified if hardware
+flow control is selected (see &K command). The parameter value, if valid,
+is written to S21 bit 2.<p>
+&R0 In sync mode, CTS tracks the state of RTS; the RTS-to-CTS delay is
+defined by S26. In async mode, CTS acts according to V.25 bis handshake. <p>
+&R1 In sync mode, CTS is always ON (RTS transitions are ignored). In async
+mode, CTS will only drop if required by flow control. (Default.)<p>
+Result Codes:<p>
+OK n = 0 or 1.<p>
+ERROR Otherwise.
+<a name="_Toc343068235"></a><a name="_Toc347715492"></a>
+<p class="bodytext"><i>
+<a name="RTFToC59">&Sn
+- DSR Override</a>
+</i></p>
+This command selects how the modem will control DSR. The parameter value, if
+valid, is written to S21 bit 6.<p>
+&S0 DSR will remain ON at all times. (Default.)<p>
+&S1 DSR will become active after answer tone has been detected and inactive
+after the carrier has been lost.<p>
+Result Codes:<p>
+OK n = 0 or 1.<p>
+ERROR Otherwise.
+<a name="_Toc343068236"></a><a name="_Toc347715493"></a>
+<p class="bodytext"><i>
+<a name="RTFToC60">&Tn
+- Test and Diagnostics</a>
+</i></p>
+The modem will perform selected test and diagnostic functions according to the
+parameter supplied. A test can be run only when in an asynchronous operation in
+non-error-correction mode (normal or direct mode). To terminate a test in
+progress, the escape sequence must be entered first, except for parameters 7
+and 8 (see Section 3.1.3). If S18 is non-zero, a test will terminate
+automatically after the time specified by S18 and display the OK message. Note:
+For tests 3, 6, and 7, a connection between the two modems must first be
+established.<p>
+&T0 Terminates test in progress. Clears S16.<p>
+&T1 Initiates local analog loopback, V.54 Loop 3. Sets S16 bit 0. If a
+connection exists when this command is issued, the modem hangs up. The CONNECT
+XXXX message is displayed upon the start of the test.<p>
+&T2 Returns ERROR.<p>
+&T3 Initiates local digital loopback, V.54 Loop 2. Sets S16 bit 2. If no
+connection exists, ERROR is returned. Sets S16 bit 4 when the test is in
+progress.<p>
+&T4 Enables digital loopback acknowledgment for remote request, i.e., an
+RDL request from a remote modem is allowed. Sets S23 bit 0.<p>
+&T5 Disables digital loopback acknowledgment for remote request, i.e., an
+RDL request from a remote modem is denied. Clears S23 bit 0. (Default.)<p>
+&T6 Requests a remote digital loopback (RDL), V.54 Loop 2, without self
+test. If no connection exists, ERROR is returned. Sets S16 bit 4 when the test
+is in progress. The CONNECT XXXX message is displayed upon the start of the
+test.<p>
+&T7 Requests a remote digital loopback (RDL),V.54 Loop 2, with self test.
+(In self test, a test pattern is looped back and checked by the modem.) If no
+connection exists, ERROR is returned. When the test is terminated either via
+expiration of S18, or via the &T0 or H command, the number of detected
+errors is reported to the DTE. Sets S16 bit 5 when the test is in progress.<p>
+&T8 Initiates local analog loopback, V.54 Loop 3, with self test. (In self
+test, a test pattern is looped back and checked by the modem.) If a connection
+exists, the modem hangs up before the test is initiated. When the test is
+terminated either via expiration of S18, or via the &T0 or H command, the
+number of detected errors is reported to the DTE. Sets S16 bit 6 when the test
+is in progress. This command may not be available in some countries due to PTT
+restrictions.
+<a name="_Toc343068237"></a><a name="_Toc347715494"></a>
+<p class="bodytext"><i>
+<a name="RTFToC61">&V
+- Display Current Configuration and Stored Profiles</a>
+</i></p>
+Reports the current (active) configuration, the stored (user) profiles, and the
+first four stored telephone numbers. The stored profiles and telephone numbers
+are not displayed if the NVRAM is not installed or is not operational as
+detected by the NVRAM test during reset processing. <p>
+Result Code:<p>
+OK<p>
+Example:<p>
+<tt>AT&V</tt><p>
+<tt>ACTIVE PROFILE:</tt><p>
+<tt>B0 E1 L1 M1 N1 QO T V1 W0 X4 Y0 &C0 &D0 &G2 &J0 &K3
+&Q5 &R1 &S0 &T4 &X0 &Y0</tt><p>
+<tt>S00:002 S01:000 S02:043 S03:013 S04:010 S05:008 S06:002 S07:030 S08:002
+S09:006</tt><p>
+<tt>S10:014 S11:255 S12:050 S18:000 S25:005 S26:001 S36:007 S37:000 S38:020
+S46:138 </tt><p>
+<tt>S48:007 S95:000</tt>
+<p>
+<p>
+<tt>STORED PROFILE 0:</tt><p>
+<tt>B0 E1 L1 M1 N1 QO T V1 W0 X4 Y0 &C0 &D0 &G2 &J0 &K3
+&Q5 &R1 &S0 &T4 &X0</tt><p>
+<tt>S00:002 S02:043 S06:002 S07:030 S08:002 S09:006 S10:014 S11:095 S12:050
+S18:000</tt><p>
+<tt>S36:007 S37:000 S40:105 S41:003 S46:138 S95:000</tt>
+<p>
+<p>
+<tt>STORED PROFILE 1:</tt><p>
+<tt>B0 E1 L1 M1 N1 QO T V1 W0 X4 Y0 &C0 &D0 &G2 &J0 &K3
+&Q5 &R1 &S0 &T4 &X0</tt><p>
+<tt>S00:002 S02:043 S06:002 S07:030 S08:002 S09:006 S10:014 S11:095 S12:050
+S18:000</tt><p>
+<tt>S36:007 S37:000 S40:105 S41:003 S46:138 S95:000</tt>
+<p>
+<p>
+<tt>TELEPHONE NUMBERS:</tt><p>
+<tt>0 = 1 =</tt><p>
+<tt>2 = 3 =</tt>
+<p>
+<p>
+<tt>OK</tt><p>
+<a name="_Toc343068238"></a>
+<a name="_Toc347715495"></a><tt></tt>
+<p class="bodytext"><i>
+<a name="RTFToC62">&Wn
+- Store Current Configuration</a>
+</i></p>
+Saves the current (active) configuration (profile), including S-Registers, in
+one of the two user profiles in NVRAM as denoted by the parameter value. This
+command will yield an ERROR message if the NVRAM is not installed or is not
+operational as detected by the NVRAM test.<p>
+The current configuration is comprised of a list of storable parameters
+illustrated in the &V command. These settings are restored to the active
+configuration upon receiving an Zn command or at power up (see &Yn
+command).<p>
+&W0 Store the current configuration as profile 0.<p>
+&W1 Store the current configuration as profile 1.<p>
+Result Codes:<p>
+OK n = 0 or 1.<p>
+ERROR Otherwise.
+<a name="_Toc343068239"></a><a name="_Toc347715496"></a>
+<p class="bodytext"><i>
+<a name="RTFToC63">&Xn
+- Select Synchronous Clock Source</a>
+</i></p>
+Selects the source of the transmit clock for the synchronous mode of operation.
+The parameter value, if valid, is written to S27 bits 4 and 5.<p>
+In asynchronous mode, the transmit and receive clocks are turned OFF. In
+synchronous mode, the clocks are turned ON with the frequency of 1200 Hz or
+faster corresponding to the speed that is selected for modem operation.<p>
+&X0 Selects internal timing. The modem generates the transmit clock signal
+and applies it to the TXCLK output at the serial interface.<p>
+&X1 Selects external timing. The local DTE sources the transmit clock
+signal on the XTCLK input of the serial interface. The modem applies this clock
+to the TXCLK output at the serial interface.<p>
+&X2 Selects slave receive timing. The modem derives the transmit clock
+signal from the incoming carrier and applies it to the TXCLK output at the
+serial interface.<p>
+Result Codes:<p>
+OK n = 0 to 2.<p>
+ERROR Otherwise.
+<a name="_Toc343068240"></a><a name="_Toc347715497"></a>
+<p class="bodytext"><i>
+<a name="RTFToC64">&Yn
+- Designate a Default Reset Profile</a>
+</i></p>
+Selects which user profile will be used after a hard reset.<p>
+&Y0 The modem will use profile 0.<p>
+&Y1 The modem will use profile 1.<p>
+Result Codes:<p>
+OK n = 0 to 1.<p>
+ERROR If n > 1, or if NVRAM is not installed or is not operational.
+<a name="_Toc343068241"></a><a name="_Toc347715498"></a>
+<p class="bodytext"><i>
+<a name="RTFToC65">&Zn=x
+- Store Telephone Number</a>
+</i></p>
+The modem can store up to four telephone numbers and each telephone number dial
+string can contain up to 34 digits.<p>
+&Zn=x n = 0 to 3 and x = dial string. (Requires 256-byte NVRAM.)<p>
+Result Codes:<p>
+OK For n <= 3, and x <= 34 digits.<p>
+ERROR If n > 3, x > 35 digits, or if NVRAM is not installed or is not
+operational.
+<a name="_Toc343068242"></a><a name="_Toc347715499"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC66">3.2.3
+AT% Commands</a>
+<a name="_Toc343068243"></a><a name="_Toc347715500"></a></i></b></p>
+<p class="bodytext"><i>
+<a name="RTFToC67">%En
+- Enable/Disable Line Quality Monitor and Auto-Retrain or Fallback/Fall
+Forward</a></a>
+</a></i></p>
+Controls whether or not the modem will automatically monitor the line quality
+and request a retrain (%E1) or fall back when line quality is insufficient or
+fall forward when line quality is sufficient (%E2). The parameter value, if
+valid, is written to S41 bits 2 and 6.<p>
+If enabled, the modem attempts to retrain for a maximum of 30 seconds.<p>
+%E0 Disable line quality monitor and auto-retrain. <p>
+%E1 Enable line quality monitor and auto-retrain.<p>
+%E2 Enable line quality monitor and fallback/fall forward. (Default.)<p>
+Result Codes:<p>
+OK n = 0, 1, or 2.<p>
+ERROR Otherwise.<p>
+<b>Fallback/Fall Forward. </b>When %E2 is active, the modem monitors the line
+quality (EQM). When line quality is insufficient, the modem will initiate a
+rate renegotiation to a lower speed within the V.34/V.FC/V.32 bis/V.32 (RC288)
+or V.32 bis/V.32 (RC144) modulation speeds. The modem will keep falling back
+within the current modulation if necessary until the speed reaches 2400 bps
+(V.34), 14400 bps (V.FC), or 4800 bps (V.32). Below this rate, the modem will
+only do retrains if EQM thresholds are exceeded. If the EQM is sufficient for
+at least one minute, the modem will initiate a rate renegotiation to a higher
+speed within the current modulation speeds. The rate renegotiations will be
+done without a retrain if a V.32 bis connection is established.<p>
+Speeds attempted during fallback/fall forward are those shown to be available
+in the rate sequences exchanged during the initial connection. Fallback/fall
+forward is available in error correction and normal modes, but not in direct
+mode or synchronous mode with external clocks.
+<a name="_Toc343068244"></a><a name="_Toc347715501"></a>
+<p class="bodytext"><i>
+<a name="RTFToC68">%L
+- Line Signal Level</a>
+</i></p>
+Returns a value which indicates the received signal level. The value returned
+is a direct indication (DAA dependent) of the receive level at the MDP,
+<b>not</b> at the telephone line connector. For example, 009 = -9 dBm, 043 =
+-43 dBm, and so on.<p>
+Result Codes:<p>
+OK
+<a name="_Toc343068245"></a><a name="_Toc347715502"></a>
+<p class="bodytext"><i>
+<a name="RTFToC69">%Q
+- Line Signal Quality</a>
+</i></p>
+Reports the line signal quality (DAA dependent). Returns the higher order byte
+of the EQM value. Based on the EQM value, retrain or fallback/fall forward may
+be initiated if enabled by %E1 or %E2.<p>
+Example:<p>
+<tt>AT%Q<br><br>015</tt><p>Result Codes:
+<p>
+OK If connected.<p>
+ERROR If not connected, or connected in 300 bps, V.23, or fax modes.
+<a name="_Toc343068248"></a><a name="_Toc347715503"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC70">3.2.4
+AT\ Commands</a>
+<a name="_Toc343068249"></a><a name="_Toc347715504"></a></i></b></p>
+<p class="bodytext"><i>
+<a name="RTFToC71">\Kn
+- Break Control</a></a>
+</a></i></p>
+Controls the response of the modem to a break received from the DTE or the
+remote modem or the \B command according to the parameter supplied. The
+parameter value, if valid, is written to S40 bits 3, 4, and 5.<p>
+The response is different in three separate states.<p>
+The first state is where the modem receives a break from the DTE when the modem
+is operating in data transfer mode:<p>
+\K0 Enter on-line command mode, no break sent to the remote modem.<p>
+\K1 Clear data buffers and send break to remote modem.<p>
+\K2 Same as 0.<p>
+\K3 Send break to remote modem immediately.<p>
+\K4 Same as 0.<p>
+\K5 Send break to remote modem in sequence with transmitted data. (Default.)<p>
+The second case is where the modem is in the on-line command state (waiting for
+AT commands) during a data connection, and the \B is received in order to send
+a break to the remote modem:<p>
+\K0 Clear data buffers and send break to remote modem.<p>
+\K1 Clear data buffers and send break to remote modem. (Same as 0.)<p>
+\K2 Send break to remote modem immediately.<p>
+\K3 Send break to remote modem immediately. (Same as 2.)<p>
+\K4 Send break to remote modem in sequence with data.<p>
+\K5 Send break to remote modem in sequence with data. (Same as 4.) (Default.)<p>
+The third case is where a break is received from a remote modem during a
+non-error corrected connection:<p>
+\K0 Clears data buffers and sends break to the DTE.<p>
+\K1 Clears data buffers and sends break to the DTE. (Same as 0.)<p>
+\K2 Send a break immediately to DTE.<p>
+\K3 Send a break immediately to DTE. (Same as 2.)<p>
+\K4 Send a break in sequence with received data to DTE.<p>
+\K5 Send a break in sequence with received data to DTE. (Same as 4.)
+(Default.)<p>
+Result Codes:<p>
+OK n = 0 to 5.<p>
+ERROR Otherwise.
+<a name="_Toc343068250"></a><a name="_Toc347715505"></a>
+<p class="bodytext"><i>
+<a name="RTFToC72">\Nn
+- Operating Mode</a>
+</i></p>
+This command controls the preferred error correcting mode to be negotiated in a
+subsequent data connection. This command is affected by the OEM firmware
+configuration.<p>
+\N0 Selects normal speed buffered mode (disables error-correction mode).
+(Forces &Q6.)<p>
+\N1 Serial interface selected - Selects direct mode and is equivalent to
+&M0, &Q0 mode of operation. (Forces &Q0.)<p>
+ Parallel interface selected - Same as \N0.<p>
+\N2 Selects reliable (error-correction) mode. The modem will first attempt a
+LAPM connection and then an MNP connection. Failure to make a reliable
+connection results in the modem hanging up. (Forces &Q5, S36=4, and
+S48=7.)<p>
+\N3 Selects auto reliable mode. This operates the same as \N2 except failure to
+make a reliable connection results in the modem falling back to the speed
+buffered normal mode. (Forces &Q5, S36=7, and S48=7.)<p>
+\N4 Selects LAPM error-correction mode. Failure to make an LAPM
+error-correction connection results in the modem hanging up. (Forces &Q5
+and S48=0.) Note: The -K1 command can override the \N4 command.<p>
+\N5 Selects MNP error-correction mode. Failure to make an MNP error-correction
+connection results in the modem hanging up. (Forces &Q5, S36=4, and
+S48=128.)<p>
+Result Codes:<p>
+OK n = 0 to 5.<p>
+ERROR Otherwise.
+<a name="_Toc347715506"></a>
+<p class="bodytext"><i>
+<a name="RTFToC73">\Vn
+- Single Line Connect Message Enable</a>
+</i></p>
+The single line connect message format can be enabled or disabled by the \Vn
+command as follows:<p>
+\V0 Connect messages are controlled by the command settings X, W, and S95.<p>
+\V1 Connect messages are displayed in the single line format described below
+subject to the command settings V (Verbose) and Q (Quiet). In Non-Verbose mode
+(V0), single line connect messages are disabled and a single numeric result
+code is generated for CONNECT DTE.<p>
+When single line connect messages are enabled, there are no CARRIER, PROTOCOL,
+or COMPRESSION messages apart from the fields described below. <p>
+The single line connect message format is: <p>
+CONNECT <DTE
+Speed></Modulation></Protocol></Compression></Line
+Speed><p>
+Where:<p>
+<DTE Speed = DTE speed, e.g., 57600.<p>
+Modulation = "V32" for V.32 or V.32bis modulations.<br>"VFC" for V.FC(TM)
+modulations.<br>"V34" for V.34 modulations.<p>
+ Note: Modulation is omitted for all other modulations.<p>
+Protocol = "NONE" for no protocol.<br>"ALT" for Microcom Network
+Protocol.<br>"LAPM" for LAP-M protocol.<p>
+Compression = "CLASS5" for Microcom MNP5 compression.<br>"V42BIS" for V.42bis
+compression.<p>
+ Note: Compression is omitted if protocol is NONE.<p>
+Line Speed = Asymmetric rates are displayed as /rate:TX/rate:RX, e.g., /1200
+TX/75 RX.<br>Symmetric rates are displayed as a single DCE rate, e.g., 14400.
+<a name="_Toc343068251"></a><a name="_Toc347715507"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC74">3.2.5
+AT+ Commands</a>
+<a name="_Toc343068252"></a><a name="_Toc347715508"></a></i></b></p>
+<p class="bodytext"><i>
+<a name="RTFToC75">+MS
+- Select Modulation</a></a>
+</a></i></p>
+This extended-format command selects the modulation, optionally enables or
+disables automode, and optionally specifies the lowest and highest connection
+rates using one to four subparameters. The command format is:<p>
++MS= <mod>
+[,[<automode>][,[<min_rate>][,[<max_rate>]]]]<CR><p>
+<b>Notes:</b><p>
+1. For 14400 bps and lower speeds, the Nn command and S37 register can
+alternatively be used, in which case the +MS subparameters will modified to
+reflect the Nn and S37=x settings. Use of the Nn and S37=x commands is not
+recommended but is provided for compatibility with existing communication
+software. (S37 is not updated by the +MS command.)<p>
+2. Subparameters not entered (enter a comma only or <CR> to skip the last
+subparameter) remain at their current values.
+<h5>
+<a name="RTFToC76">Reporting
+Selected Options
+</a></h5>
+The modem can send a string of information to the DTE consisting of selected
+options using the following command:<p>
++MS?<p>
+The response is:<p>
++MS: <mod>,<automode>,<min_rate>,<max_rate><p>
+For example,<p>
++MS: 11,1,300,28800 (shows default values) [RC288]<p>
++MS: 10,1,300,14400 (shows default values) [RC144]
+<h5>
+<a name="RTFToC77">Reporting
+Supported Options
+</a></h5>
+The modem can send a string of information to the DTE consisting of supported
+options using the following command:<p>
++MS=?<p>
+The response is:<p>
++MS: (list of supported <mod> values), (list of supported
+<automode> values) (list of supported <min_rate> values), <br>(list
+of supported <max_rate> values)<p>
+For example,<p>
++MS: (0, 1, 2, 3, 9, 10, 11, 64, 69, 74), (0,1) (300-28800), (300-28800)
+[RC288]<p>
++MS: (0, 1, 2, 3, 9, 10, 64, 69), (0,1) (300-14400), (300-14400) [RC144]<p>
+
+<h5>
+<a name="RTFToC78">Subparameter
+Definitions
+</a></h5>
+1. <mod> = A decimal number which specifies the preferred modulation
+(automode enabled) or the modulation (automode disabled) to use in originating
+or answering a connection. The options are:
+
+<pre>
+ <mod> Modulation Possible Rates (bps) 1 Notes
+ 0 V.21 300
+ 1 V.22 1200
+ 2 V.22 bis 2400 or 1200
+ 3 V.23 1200 See Note 2
+ 9 V.32 9600 or 4800
+ 10 V.32 bis 14400, 12000, 9600, 7200, or 4800 Default
+ [RC144]
+ 11 V.34 28800, 26400, 24000, 21600, 19200, Default
+ 16800, 14400, 12000, 9600, 7200, 4800, [RC288]
+ or 2400 [RC288 only]
+ 64 Bell 103 300
+ 69 Bell 212 1200
+ 74 V.FC 28800, 26400, 24000, 21600, 19200, [RC288 only]
+ 16800, or 14400
+Notes: 1. See optional <automode>, <min_rate>, and <max_rate> subparameters. 2.
+For V.23, originating modes transmit at 75 bps and receive at 1200 bps; answering
+modes transmit at 1200 bps and receive at 75 bps. The rate is always specified as
+1200 bps.
+
+</pre>
+
+The modem may also automatically switch to another modulation (automode),
+subject to the following constraints:<p>
+a. The modem may not be able to automatically switch from the current
+modulation (specified by <mod>) to some other modulation. For example,
+there is no standard way to automode from Bell 103 to V.23.<p>
+b. The DTE may disable automode operation (see <automode> below).<p>
+c. The DTE may constrain the range of modulations available by specifying the
+lowest and highest rates (see <min_rate> and <max_rate> below).<p>
+2. <automode> is an optional numeric value which enables or disables
+automatic modulation negotiation using V.8 or V.32 bis Annex A. The options are:
+
+<pre>
+ <automode> Option Selected Notes
+ 0 Automode disabled
+ 1 Automode enabled using V.8 or V.32 Annex A Default
+
+</pre>
+<p>
+The default value is 1, which enables automode. Note, however, there are
+modulations for which there is no automatic negotiation, e.g., Bell 212
+(<mod> = 69).<p>
+<b>For <automode> = 0 (automode disabled, i.e., fixed modulation):</b><p>
+a. If <max_rate> is within the rates supported by the selected
+modulation, the selected rate is that specified by <max_rate>. For
+example:<p>
+ +MS=10,0,1200,4800 selects V.32 bis 4800 bps fixed rate.<p>
+b. If <max_rate> is greater than the highest speed supported by the
+modulation specified by <mod>, the starting rate is the highest rate
+supported by the selected modulation. For example:<p>
+ +MS=10,0,2400,14400 selects V.32 bis 14400, 12000, 9600, 7200, or 4800 bps.<p>
+c. To emulate issuance of the N0S37=x command sequence to select fixed mode
+operation, specify the <max_rate> and <min_rate> both to be the
+(same) requested speed, and <mod> to be the modulation for that speed.
+For example:<p>
+ +MS=11,0,16800,16800 selects V.34 16800 bps fixed mode (no comparable S37
+command).<p>
+ +MS=10,0,12000,12000 selects V.32 bis 12000 bps fixed mode (same as
+N0S37=10).<p>
+<b>For <automode> = 1 (automode enabled, i.e., automatically selected
+speed and modulation): </b><p>
+The modem connects at the highest possible rate in accordance with V.8,
+or V.32 bis Annex A if V.8 is not supported by the remote modem. <p>
+a. If <max_rate> is greater than the highest rate supported by the
+modulation specified by <mod>, the modem automodes down from the highest
+rate of the selected modulation. For example:<p>
+ +MS=10,1,1200,24000 selects automoding down from V.32 bis 14400 bps. <p>
+b. To emulate issuance of the N1S37=x sequence command, specify the modulation
+and the rate to start automoding down from using <mod> and
+<max_rate>, respectively. Set <min_rate> to 300 to allow automoding
+all the way down to V.21 300 bps. For example:<p>
+ +MS=11,1,300,16800 selects automode starting at V.34 16800 bps (no comparable
+S37 command).<p>
+ +MS=9,1,300,12000 selects automode starting at V.32 bis 12000 bps (same as
+N1S37=10).<p>
+3. <min_rate> is an optional number which specifies the lowest rate at
+which the modem may establish a connection. The value is decimal coded, in
+units of bps, e.g., 2400 specifies the lowest rate to be 2400 bps. The default
+is 300 for 300 bps.<p>
+4. <max_rate> is an optional number which specifies the highest rate at
+which the modem may establish a connection. The value is decimal coded, in
+units of bps, e.g., 14400 specifies the highest rate to be 14400 bps. The
+default is 28800 for 28800 bps.
+<a name="_Toc343068253"></a><a name="_Toc347715509"></a>
+<p class="bodytext"><i>
+<a name="RTFToC79">+Hn
+- Enable/Disable RPI and DTE Speed</a>
+</i></p>
+This command enables or disables Rockwell Protocol Interface (RPI) processing
+and sets the DTE speed. (Applicable only to modems supporting RPI and RPI+).<p>
++H0 Disable RPI/RPI+.<p>
++H1 Enable RPI mode and set DTE speed to 19200 bps.<p>
++H2 Enable RPI mode and set DTE speed to 38400 bps.<p>
++H3 Enable RPI mode and set DTE speed to 57600 bps.<p>
++H11 Enable RPI+ mode (applicable only to modems supporting RPI). When in RPI+
+mode, a link is established between the modem and the WinRPI or WinRPI95 host
+PC software driver to allow the modem to support protocol
+(V.42bis/LAP-M/MNP2-5) connections with a remote modem. This command should
+only be used when the WinRPI or WinRPI95 driver software is installed in the
+PC.<p>
+Result Codes:<p>
+OK n = 0 to 3, 11.<p>
+ERROR Otherwise.
+<a name="_Toc343068256"></a><a name="_Toc347715510"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC80">3.2.6
+AT- Commands</a>
+<a name="_Toc343068257"></a><a name="_Toc347715511"></a></i></b></p>
+<p class="bodytext"><i>
+<a name="RTFToC81">-SDR=n
+- Enable/Disable Distinctive Ring</a></a>
+</a></i></p>
+This command enables or disables detection and reporting of distinctive ring.
+The syntax is AT-SDR=n, where n is a number from 0 to 7. One, two, or three
+distinctive ring types can be simultaneously enabled depending upon the value
+of n (bit mapped). The detected ring type is reported in the long form
+(verbose) of the result code by appending the ring type number to the end of
+the RING message.<p>
+-SDR=0 Disables Distinctive Ring. Any valid ring detected is reported as RING
+(default). <p>
+-SDR=1 Enables Distinctive Ring Type 1.<p>
+-SDR=2 Enables Distinctive Ring Type 2.<p>
+-SDR=3 Enables Distinctive Ring Type 1 and 2.<p>
+-SDR=4 Enables Distinctive Ring Type 3.<p>
+-SDR=5 Enables Distinctive Ring Type 1 and 3.<p>
+-SDR=6 Enables Distinctive Ring Type 2 and 3.<p>
+-SDR=7 Enables Distinctive Ring Type 1, 2, and 3.<p>
+Result Codes:<p>
+OK n = 0 to 7.<p>
+ERROR Otherwise.<p>
+The n value bit map is:<p>
+Bit 0=1 Enable RING type 1. RING type 1 is detected and reported as RING1.<p>
+Bit 1=1 Enable RING type 2. RING type 2 is detected and reported as RING2.<p>
+Bit 2=1 Enable RING type 3. RING type 3 is detected and reported as RING3.<p>
+<p>
+The ring types supported and the corresponding ring cadence detect criteria are:
+
+<pre>
+Distinctive Ring Cadence Detect Criteria
+ Ring Type
+ 1 2.0 sec ON, 4.0 sec OFF.
+ 2 0.8 sec ON, 0.4 sec OFF, 0.8 sec ON, 4.0 sec OFF.
+ 3 0.4 sec ON, 0.2 sec OFF, 0.4 sec ON, 0.2 sec OFF, 0.8 sec ON,
+ 4.0 sec OFF.
+
+</pre>
+<p>
+<b>Notes:</b><p>
+1. The Ring Indicate (RI) output does not toggle on the first ring if
+AT-SDR!=0. <p>
+2. The RI output waveform is the same for all ring types detected, i.e., RI is
+on for the total duration of the ring period.
+<a name="_Toc343068258"></a><a name="_Toc347715512"></a>
+<p class="bodytext"><i>
+<a name="RTFToC82">-SSE=n
+- Enable/Disable DSVD</a>
+</i></p>
+This command enables or disables DSVD (digital simultaneous voice and data) in
+modem models supporting DSVD. The syntax is AT-SSE=n, where n is a number from
+0 to 1. <p>
+-SSE=0 Disables DSVD (default). <p>
+-SSE=1 Enables DSVD.<p>
+Result Codes:<p>
+OK n = 0 and 1.<p>
+ERROR Otherwise.<p>
+<a name="_Toc343068259"></a><a name="_Toc347715513"></a>
+<p class="bodytext"><b>
+<a name="RTFToC83">3.3
+ERROR DETECTION AND DATA COMPRESSION COMMANDS</a>
+<a name="_Toc343068260"></a><a name="_Toc347715514"></a></b></p>
+<p class="bodytext"><b><i>
+<a name="RTFToC84">3.3.1
+AT% Commands</a></a>
+</a><a name="_Toc343068261"></a><a name="_Toc347715515"></a></i></b></p>
+<p class="bodytext"><i>
+<a name="RTFToC85">%C
+- Enable/Disable Data Compression</a></a>
+</a></i></p>
+Enables or disables data compression negotiation. The modem can only perform
+data compression on an error corrected link. The parameter value, if valid, is
+written to S41 bits 0 and 1.<p>
+%C0 Disables data compression. Resets S46 bit 1.<p>
+%C1 Enables MNP 5 data compression negotiation. Resets S46 bit 1.<p>
+%C2 Enables V.42 bis data compression. Sets S46 bit 1.<p>
+%C3 Enables both V.42 bis and MNP 5 data compression. Sets S46 bit 1.
+(Default.)<p>
+Result Codes:<p>
+OK n = 0, 1, 2, or 3.<p>
+ERROR Otherwise.
+<a name="_Toc343068262"></a><a name="_Toc347715516"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC86">3.3.2
+AT\ Commands</a>
+<a name="_Toc343068263"></a><a name="_Toc347715517"></a></i></b></p>
+<p class="bodytext"><i>
+<a name="RTFToC87">\An
+- Select Maximum MNP Block Size</a></a>
+</a></i></p>
+The modem will operate an MNP error corrected link using a maximum block size
+controlled by the parameter supplied. The parameter value, if valid, is written
+to S40 bits 6 and 7.<p>
+\A0 64 characters.<p>
+\A1 128 characters. (Default.)<p>
+\A2 192 characters.<p>
+\A3 256 characters.<p>
+Result Codes:<p>
+OK n = 0 to 3.<p>
+ERROR Otherwise.
+<a name="_Toc343068264"></a><a name="_Toc347715518"></a>
+<p class="bodytext"><i>
+<a name="RTFToC88">\Bn
+- Transmit Break to Remote</a>
+</i></p>
+In non-error correction mode, the modem will transmit a break signal to the
+remote modem with a length in multiples of 100 ms according to parameter
+specified. If a number in excess of 9 is entered, 9 is used. The command works
+in conjunction with the \K command.<p>
+In error correction mode, the modem will signal a break through the active
+error correction protocol, giving no indication of the length.<p>
+\B1-\B9 Break length in 100 ms units. (Default = 3.) (Non-error corrected mode
+only.)<p>
+Result Codes:<p>
+OK If connected in data modem mode.<p>
+NO CARRIER If not connected or connected in fax modem mode.<p>
+<b>Note: </b>When the modem receives a break from the remote modem, break is
+passed to the DTE as follows: In non-error correction mode direct, the break
+length is passed; in non-error correction mode normal and in error correction
+mode, a 300 ms break is passed.
+<a name="_Toc343068265"></a><a name="_Toc347715519"></a>
+<p class="bodytext"><b>
+<a name="RTFToC89">3.4
+MNP 10 COMMANDS</a>
+<a name="_Toc343068266"></a><a name="_Toc347715520"></a></b></p>
+<p class="bodytext"><b><i>
+<a name="RTFToC90">3.4.1
+AT) Commands</a></a>
+</a><a name="_Toc343068267"></a><a name="_Toc347715521"></a></i></b></p>
+<p class="bodytext"><i>
+<a name="RTFToC91">)Mn
+- Enable Cellular Power Level Adjustment</a></a>
+</a></i></p>
+This command is included only for compatibility and performs no function.<p>
+)M0 )M0 command.<p>
+)M1 )M1 command.<p>
+)M2 )M2 command.<p>
+Result Codes:<p>
+OK n = 0 to 2.<p>
+ERROR Otherwise.
+<a name="_Toc343068268"></a><a name="_Toc347715522"></a>
+<p class="bodytext"><i>
+<a name="RTFToC92">*Hn
+- Link Negotiation Speed</a>
+</i></p>
+This command is included only for compatibility and performs no function.<p>
+*H0 *H0 command.<p>
+*H1 *H1 command.<p>
+*H2 *H2 command.<p>
+Result Codes:<p>
+OK n = 0 to 2.<p>
+ERROR Otherwise.
+<a name="_Toc343068269"></a><a name="_Toc347715523"></a>
+<p class="bodytext"><i>
+<a name="RTFToC93">-Kn
+- MNP Extended Services</a>
+</i></p>
+Enables or disables conversion of a V.42 LAPM connection to an MNP 10
+connection. The parameter value, if valid, is written to S40 bits 0 and 1.<p>
+-K0 Disables V.42 LAPM to MNP 10 conversion. (Default.)<p>
+-K1 Enables V.42 LAPM to MNP 10 conversion.<p>
+-K2 Enables V.42 LAPM to MNP 10 conversion; inhibits MNP Extended Services
+initiation during V.42 LAPM answer mode detection phase.<p>
+Result Codes:<p>
+OK n = 0 or 2.<p>
+ERROR Otherwise.
+<a name="_Toc343068270"></a><a name="_Toc347715524"></a>
+<p class="bodytext"><i>
+<a name="RTFToC94">-Qn
+- Enable Fallback to V.22 bis/V.22</a>
+</i></p>
+This command is included only for compatibility and performs no function.<p>
+-Q0 -Q0 command.<p>
+-Q1 -Q1 command.<p>
+Result Codes:<p>
+OK n = 0 or 1.<p>
+ERROR Otherwise.
+<a name="_Toc343068271"></a><a name="_Toc347715525"></a>
+<p class="bodytext"><i>
+<a name="RTFToC95">-SEC=n
+- Enable/Disable MNP10-EC</a>
+</i></p>
+Enables or disables MNP10-EC operation. The command format is: <p>
+ -SEC=n,[<tx level>] where <tx level> is the optional transmit
+level sub parameter.<p>
+-SEC=0 Disable MNP10-EC; the transmit level is that defined in S91.<p>
+-SEC=1,[<tx level>] Enable MNP10-EC; the transmit level will be defined
+by the sub parameter <tx level> range 0 to 30 (0 dBm to -30 dBm), the
+default <tx level> (<tx level> not specified) is the S91 value.<p>
+Result Codes:<p>
+OK n=0, 1, or 1 and <tx level>=0 to 30<p>
+ERROR Otherwise<p>
+Example: AT-SEC=1,18 enables MNP10-EC and sets the transmit level to -18 dBm.<p>
+<b>Note: </b>If AT-SEC=0, the modem will automatically set AT-SEC=1 if the
+remote modem indicates Cellular in the V.8 phase or if a Cellular Driver is
+loaded and the Cell Phone is attached.<p>
+<b><i>Inquiries</i></b><p>
+AT-SEC? Retrieves the current -SEC command settings, e.g.,
+1,18.<a name="_Toc343068272"></a><a name="_Toc347715526"></a>
+<b><i></i></b>
+<p class="bodytext"><i>
+<a name="RTFToC96">@Mn
+- Initial Cellular Power Level Setting</a>
+</i></p>
+This command is included only for compatibility and performs no function.<p>
+@M0 @M0 command.<p>
+.<p>
+.<p>
+.<p>
+@M30 @M30 command.<p>
+Result Codes:<p>
+OK n = 0 to 30.<p>
+ERROR Otherwise.
+<a name="_Toc343068273"></a><a name="_Toc347715527"></a>
+<p class="bodytext"><i>
+<a name="RTFToC97">:E
+- Compromise Equalizer Enable Command</a>
+</i></p>
+This command is included only for compatibility and performs no function.<p>
+:E0 :E0 command.<p>
+:E1 :E1 command.<p>
+<p>
+Result Codes:<p>
+OK n = 0 or 1.<p>
+ERROR Otherwise.
+<a name="_Toc343068274"></a><a name="_Toc347715528"></a>
+<p class="bodytext"><b>
+<a name="RTFToC98">3.5
+W-CLASS COMMANDS</a>
+<a name="_Toc343068275"></a><a name="_Toc347715529"></a></b></p>
+<p class="bodytext"><b><i>
+<a name="RTFToC99">3.5.1
+AT* Commands</a></a>
+</a><a name="_Toc343068276"></a><a name="_Toc347715530"></a></i></b></p>
+<p class="bodytext"><i>
+<a name="RTFToC100">*B
+- Display Blacklisted Numbers</a></a>
+</a></i></p>
+This command requests the modem to return a list of blacklisted numbers to the
+DTE. The format of the response is shown by the example below. Permanently
+forbidden numbers as defined by country requirements will not appear on this
+list. If no numbers are blacklisted, only the OK result code is issued.<p>
+Example:<p>
+<tt> NO. - PHONE NUMBER -</tt><p>
+<tt> ------ ------------------------------</tt><p>
+<tt> 1; 4175537660<br> 2; 8288924961<br> 3; 3887278862<br> 4; 3124839442<br> 5;
+6284664</tt>
+<p>
+<p>
+<tt> OK
+</tt><a name="_Toc343068277"></a><a name="_Toc347715531"></a><tt></tt>
+<p class="bodytext"><i>
+<a name="RTFToC101">*D
+- Display Delayed Numbers</a>
+</i></p>
+This command causes the modem to send a list of the delayed numbers together
+with the delay associated with each. The modem will return a list of delayed
+telephone numbers as defined in the *B command. The format of the response is
+shown by the example below (delay times are shown as hours:minutes:seconds). If
+no numbers are delayed, only the OK result code is issued.<p>
+Example:<p>
+<tt> NO. - PHONE NUMBER -DELAY</tt><p>
+<tt> ------ -------------------------------------------</tt><p>
+<tt> 1; 8264734660 2:00:00<br> 2; 7532634661 2:00:00<br> 3; 2587334662
+0:02:00<br> 4; 7532651663 0:03:25<br> 5; 7459931664 0:01:45</tt>
+<p>
+<p>
+<tt> OK
+</tt><a name="_Toc343068279"></a><a name="_Toc347715532"></a><tt></tt>
+<p class="bodytext"><b>
+<a name="RTFToC102">3.6
+CALLER ID COMMANDS</a>
+<a name="_Toc343068280"></a><a name="_Toc347715533"></a></b></p>
+<p class="bodytext"><b><i>
+<a name="RTFToC103">3.6.1
+AT#CID Command</a></a>
+</a><a name="_Toc343068281"></a><a name="_Toc347715534"></a></i></b></p>
+<p class="bodytext"><i>
+<a name="RTFToC104">#CIDn
+- Caller ID</a></a>
+</a></i></p>
+Enables or disables Caller ID.<p>
+#CID=0 Disables Caller ID. (Default.)<p>
+#CID=1 Enables Caller ID with formatted presentation to the DTE. The modem will
+present the data items in a <Tag><Value> pair format. The expected
+pairs are data, time, caller code (telephone number), and name.<p>
+#CID=2 Enables Caller ID with unformatted presentation to the DTE. The modem
+will present the entire packet of information, excluding the leading U's, in
+ASCII printable hex numbers.<p>
+Result Codes:<p>
+OK n = 0 or 2.<p>
+ERROR Otherwise.
+<a name="_Toc343068282"></a><a name="_Toc347715535"></a>
+<p class="bodytext"><i>
+<a name="RTFToC105">Inquiries</a></i></p>
+#CID? Retrieves the current Caller ID mode from the modem.<p>
+#CID=? Returns the mode capabilities of the modem in a list with each element
+separated by commas.
+<a name="_Toc343068283"></a><a name="_Toc347715536"></a>
+<p class="bodytext"><i>
+<a name="RTFToC106">Formatted
+Form Reporting</a>
+</i></p>
+The modem presents the data in the <tag> = <value> pair format as
+described in the table below. Spaces are present on both sides of the equal
+sign.<p>
+<b> Tag Description</b><p>
+DATE DATE = MMDD where MM is the month number (01 to 12) and DD is the
+day number (01..31).<p>
+TIME TIME = HHMM where HH is the hour number (00 to 23) and MM is the minute
+number (00 to 59).<p>
+NMBR NMBR = <number> or P or O where <number> is the telephone
+number of the caller, where P indicates that the calling number information is
+not available since the originating caller has requested private service, and
+where O indicates that the calling number information is not available or out
+of service at the calling location.<p>
+NAME NAME = <listing name> where <listing name> is the subscription
+name.<p>
+MESG MESG = <data tag> <length of message> <data>
+<checksum> in printable ASCII hex numbers. This tag indicates a data item
+not listed above. The message is only possible for Multiple Message Format.<p>
+<b>Notes:</b><p>
+1. The modem does not present any Caller ID information if the DCE detects a
+checksum error in the Caller ID packet.<p>
+2. In the event of an unrecognized data tag, the modem will present the data in
+ASCII hex numbers following the MESG tag.
+<a name="_Toc343068284"></a><a name="_Toc347715537"></a>
+<p class="bodytext"><i>
+<a name="RTFToC107">Example
+of Formatted Form Reporting</a>
+</i></p>
+1. The following example illustrates the standard Caller ID message packet.<p>
+<tt>RING</tt><p>
+<tt>DATE = 0321<br>TIME = 1405<br>NMBR = 5045551234<br>NAME = A N OTHER</tt><p>
+<tt>RING</tt><p>
+<tt>RING</tt><p>2. The following example illustrates the case where the tag of the
+packet is not recognized by the modem.
+<p>
+<tt>RING</tt><p>
+<tt>MESG = 060342424231</tt><p>
+<tt>RING</tt><p>
+<tt>RING</tt>
+<a name="_Toc343068285"></a><a name="_Toc347715538"></a>
+<p class="bodytext"><i>
+<a name="RTFToC108">Unformatted
+Form Reporting</a>
+</i></p>
+The modem presents all information and packet control information found in the
+message. The modem, however, excludes the leading U's (channel seizure
+information) from the presentation. The packet is presented in ASCII printable
+hex numbers, the modem does not insert spaces, or line feeds, for formatting
+between bytes or words of the packet.<p>
+The modem does not detect the checksum of the packet.
+<a name="_Toc343068286"></a><a name="_Toc347715539"></a>
+<p class="bodytext"><i>
+<a name="RTFToC109">Example
+of Unformatted Form Reporting</a>
+</i></p>
+<tt>RING</tt><p>
+<tt>0412303332323234303539313435353132333435</tt><p>
+<tt>RING</tt><p>
+<tt>RING
+</tt><a name="_Toc343068287"></a><a name="_Toc347715540"></a><tt></tt>
+<p class="bodytext"><b>
+<a name="RTFToC110">3.7
+CELLULAR COMMANDS</a>
+</b></p>
+The Direct Connect Modem allows a direct interface to most cellular telephones
+eliminating the need for other intelligent interfaces. <p>
+Landline modems operate with the telephone system by either going off hook
+detecting dialtone and the dialing the telephone number using pulses or DTMF
+digits, or detecting the RING signal and answering the call. Intelligent
+cellular phone interfaces connect between the modems RJ-11 socket and the
+cellular phone's data interface. The interface provides landline features to
+the modem (line current, dial tone, ringing, etc.), and translates the modem's
+signals (off hook, DTMF digits, etc.) into signals that the cellular phone
+understands. Once connected the interface acts as a transparent link between
+the modem and the cellular telephone.<p>
+The Direct Connect Modem interfaces directly to the cellular phone's data
+interface and provides direct control over the cellular phones operation. For
+example if the user were to instruct the modem to dial using the ATDTnnnn
+command the modem would relay the telephone number and the SEND command to the
+cellular phone over the data interface.<p>
+The modem connects to the cellular phone using a special cable which must be
+purchased separately. A different cable is required for each cellular phone or
+make of cellular phones. Below is a block diagram of a typical Direct Connect
+Cellular Modem (based on AK14-X270 Rev 4 reference schematic).
+<a name="_Toc343068288"></a><a name="_Toc347715541"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC111">3.7.1
+Cellular Phone Drivers</a>
+</i></b></p>
+The data interface to cellular phones differs between manufacturers and models
+and requires a unique cellular phone driver for each phone or group of phones.
+Therefore the particular phone driver needs to be downloaded from the PC into
+the modem's RAM before the modem can be used directly with the cellular phone.
+If a driver is not loaded the modem will operate as a normal landline modem.
+<a name="_Toc343068289"></a><a name="_Toc347715542"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC112">3.7.2
+Cellular Commands</a>
+<a name="_Toc343068290"></a><a name="_Toc347715543"></a></i></b></p>
+<p class="bodytext"><i>
+<a name="RTFToC113">^C2
+- Download Cellular Phone Driver</a></a>
+</a></i></p>
+The ^C2 command initiates the cellular phone driver download function. Upon
+receipt of the command, the modem issues the "OK" message. The user then
+performs an ASCII download of the driver (in .S37 format) from the host to the
+modem, typically using a communications software package (with transmit pacing
+turned off). <p>
+^C2 Download Cellular Phone command<p>
+Result Codes:<p>
+OK<p>
+[Download Process]<p>
+OK Cellular phone driver download completed successfully<p>
+ERROR Cellular phone driver download not completed successfully, e.g., checksum
+of record (in S37 file) is not correct, driver size is larger than 2k bytes, or
+an invalid driver is downloaded, or modem is connected.
+<a name="_Toc343068291"></a><a name="_Toc347715544"></a>
+<p class="bodytext"><i>
+<a name="RTFToC114">^I
+- Identify Cellular Phone Driver</a>
+</i></p>
+The modem reports the identification of the loaded cellular phone driver in
+response to the ^I command. The response is dependent upon the driver. <p>
+Result Codes (Typical):<p>
+CELLULAR DRIVER: OKI 900/910<p>
+(c) Copyright 1994, Spectrum Cellular, Inc.<p>
+Version 0.07 Thu Jan 10:29:52 1994<p>
+OK<p>
+or<p>
+ERROR Cellular phone driver is not loaded
+<a name="_Toc343068292"></a><a name="_Toc347715545"></a>
+<p class="bodytext"><i>
+<a name="RTFToC115">^T6
+- Indicate Status of Cellular Phone</a>
+</i></p>
+The status of the cellular phone connected to the modem is reported in response
+to the ^T6 command. The status is reported in a single byte formatted as a
+decimal number. The individual status signals assigned to the status byte bits
+are:<p>
+ bit 0 1 = Cellular phone is receiving an incoming call<p>
+ bit 1 1 = Cellular phone is in use<p>
+ bit 2 1 = Cellular phone is locked (cannot be used)<p>
+ bit 3 1 = There is no service for cellular phone (does not indicate signal
+strength)<p>
+ bit 4 1 = Cellular phone is powered on<p>
+ bit 5 1 = Cellular driver is initialized<p>
+ bit 6 0 = Reserved (0)<p>
+ bit 7 1 = Cellular cable detected<p>
+Result Codes (typical):<p>
+128 (Cellular cable detected)<p>
+OK
+<h5>
+<a name="RTFToC116">Application
+of ^T6 Status Byte
+</a></h5>
+The information obtained by issuing a AT^T6 can be used to determine if the
+loading of the cellular phone driver is necessary by the host software. A
+download is not necessary if landline (or no cable) is connected to the modem,
+in which ^T6 will return a value of 0 (bit 7=0). A download is necessary when a
+cellular cable is detected (implied cellular phone is also connected), in which
+^T6 will return a value of 128 (bit 7=1). Once a driver is downloaded to the
+modem, it will be able to operate in landline or cellular mode based on
+detection of a cellular cable.
+<a name="_Toc343068293"></a><a name="_Toc347715546"></a>
+<p class="bodytext"><b><i>
+<a name="RTFToC117">3.7.3
+Operation</a>
+</i></b></p>
+Once the driver is loaded and the modem is connected to the cellular phone, and
+the phone is powered on dial/answer functions will be routed through the phone
+instead of the landline DAA, i.e., no special commands are needed to place or
+answer calls, the same AT commands and software packages that are used for
+landline communication sessions can be used. If the cellular phone is not
+connected or is powered off dial/answer functions will be routed through the
+landline DAA, and if V.42 bis connection is established the cellular phone
+driver will be purged so that the V.42 bis dictionaries can be increased to
+their normal size.<p>
+While the modem is being used with a cellular phone it will respond with normal
+result messages with the following differences in meaning:<p>
+NO DIALTONE Indicates that cellular service is not currently available.<p>
+RING Indicates that the cellular phone is receiving an incoming call.
+<a name="_Toc343068294"></a><a name="_Toc347715547"></a>
+<p class="bodytext"><i>
+<a name="RTFToC118">Modem
+Configuration</a>
+</i></p>
+Modem performance will be improved by modification of your standard
+configuration; it is recommended that the landline modem also be EC compatible
+for reliable communications.<p>
+Cell Site AT&F<p>
+Base Site AT&F -SEC=1,18<p>
+MNP10-EC is automatically enabled on the cell side when a cellular phone driver
+is loaded and the modem firmware detects that the cellular phone is attached,
+also in the V.34 products the modem is automatically configured to force the
+connection in V.32bis mode.<p>
+On the cell side the transmit level is defined in the cellular driver,
+therefore it is not necessary to set the level using the AT-SEC command.<p>
+In the V.34 products on the landline side if MNP10-EC is disabled (AT-SEC=0),
+it will automatically be enabled if another V.34 modem is calling (V.8 signal
+indicates cellular capability). No particular modulation will be chosen on the
+land line side. Therefore if a landside V.34 modem is NOT going to receive any
+calls from a V.32bis MNP10-EC modem it can be configured using AT&F
+-SEC=0,18 , otherwise use the configuration above.<p>
+In V.34 modems if MNP10-EC is enabled manually (using AT-SEC=1) no particular
+modulation will be chosen, therefore if the user wishes to force V.32bis
+modulation they should use the AT+MS=10,1,minspeed,maxspeed command (e.g.
+AT+MS=10,1,4800,12000 would force V.32bis and limit the speed between 4800 and
+12000 bps). To allow V.34 modulation use AT+MS=11,1,minspeed,maxspeed (e.g.
+AT+MS=11,1,4800,19200 would allow V.34 speeds between 4800 and 19200).<p>
+When MNP10-EC is enabled in V.34 modes the symbol rate is limited to 3000,
+therefore the maximum speed would be 26.4K however the initial connect speed is
+limited to 21600.<p>
+If an AXCELL(TM) solution is used, a transmit level of -10dBm is required,
+therefore the following init string should be used:<p>
+Cell Site AT &F -SEC=1,10<p>
+It is recommended that systems be set up if possible with separate modems to
+receive calls from other land based modems and cellular modems. This is so that
+land based users that experience high network attenuation do not have
+connection problems when communicating to modems configured for cellular
+operation.<p>
+The above configurations are the minimum additional AT commands may be issued
+to change the result messages etc, AT&F is used to ensure that the modem is
+in a know state.<p>
+Table 3-2 summarizes the mode and resulting transmit levels for both modems
+depending on their configuration.
+<a name="_Toc347715548"></a>
+<p class="bodytext"><i>
+<a name="RTFToC119">Fax
+Configuration</a>
+</i></p>
+It is recommended that fax transmissions be configured to operate at 9600 bps
+in V.17 mode or 7200 bps in V.29 mode.
+<a name="_Toc347715549"></a>
+<p class="bodytext"><i>
+<a name="RTFToC120">Cellular
+Phone Configuration</a>
+</i></p>
+To achieve the best operational performance, a cellular data connection should
+be attempted in a location where adequate signal strength is observed for the
+cellular phone. This condition can be easily monitored on some phones with
+signal strength indicator. In locations where even voice calls are unreliable,
+data connections should not be attempted. Under some circumstances a special
+high gain antenna may improve performance.<p>
+Additional information regarding the use of the cellular phone and cellular
+network should be obtained from the service provider and or cellular phone
+manufacturer.
+<a name="_Ref345229775"></a><p>
+<a name="_Ref345310964"></a><a name="_Toc347715838"></a><p>
+<b>Table 3-2. Remote Modem Configuration and Resulting Transmit
+Levels</b>
+
+<pre>
+ Remote Modem Base Site Configuration<br>(Connected to PSTN)
+ Configuration
+ AT&F-SEC=0,x AT&F-SEC=1,x
+ V.34 V.32bis V.34 V.32bis
+V.34<br>Dir AT&F Mod = Mod = Mod = Mod =
+ect<br>Conn V.32bis<br>Mode = V.32bis<br>Mode = V.32bis<br>Mode = V.32bis<br>Mode =
+ect -EC<br>RTxlv = Single -EC<br>RTxlv = -EC<br>RTxlv =
+ Driver<br>BTxlv = -EC<br>RTxlv = Driver<br>BTxlv = Driver<br>BTxlv =
+ x Driver<br>BTxlv = x x
+ -10
+ AT&F-SEC=1,x Mod = Mod = Mod = Mod =
+ V.34<br>Mode = V.32bis<br>Mode = V.34<br>Mode = V.32bis<br>Mode =
+ -EC<br>RTxlv = Single -EC<br>RTxlv = -EC<br>RTxlv =
+ x<br>BTxlv = x -EC<br>RTxlv = x<br>BTxlv = x x<br>BTxlv = x
+ x<br>BTxlv = -10
+V.32bis<br> AT&F Mod = Mod = Mod = Mod =
+Direct<br>C V.32bis<br>Mode = V.32bis<br>Mode = V.32bis<br>Mode = V.32bis<br>Mode =
+onnect Single Single -EC<br>RTxlv = -EC<br>RTxlv =
+ -EC<br>RTxlv = -EC<br>RTxlv = Driver<br>BTxlv = Driver<br>BTxlv =
+ Driver<br>BTxlv = Driver<br>BTxlv = x x
+ -10 -10
+ AT&F-SEC=1,x Mod = Mod = Mod = Mod =
+ V.32bis<br>Mode = V.32bis<br>Mode = V.32bis<br>Mode = V.32bis<br>Mode =
+ Single Single -EC<br>RTxlv = -EC<br>RTxlv =
+ -EC<br>RTxlv = -EC<br>RTxlv = x<br>BTxlv = x x<br>BTxlv = x
+ x<br>BTxlv = -10 x<br>BTxlv = -10
+V.34<br>PST AT&F Mod = Mod = Mod = Mod =
+N V.34<br>Mode = V.32bis<br>Mode = V.34<br>Mode = V.32bis<br>Mode =
+ non -EC<br>RTxlv non -EC<br>RTxlv Single Single
+ = -10<br>BTxlv = = -10<br>BTxlv = -EC<br>RTxlv = -EC<br>RTxlv =
+ -10 -10 -10<br>BTxlv = x -10<br>BTxlv = x
+V.32bis<br> AT&F Mod = Mod = Mod = Mod =
+PSTN V.32bis<br>Mode = V.32bis<br>Mode = V.32bis<br>Mode = V.32bis<br>Mode =
+ non -EC<br>RTxlv non -EC<br>RTxlv Single Single
+ = -10<br>BTxlv = = -10<br>BTxlv = -EC<br>RTxlv = -EC<br>RTxlv =
+ -10 -10 -10<br>BTxlv = x -10<br>BTxlv = x
+Key: Mod = Modulation negotiated (V.32bis or V.34) Mode = -EC = Both ends in MNP10-EC
+mode Single -EC = one end in MNP10-EC mode non -EC = neither end in MNP10-EC mode
+RTxlv = Transmit level of Remote side modem in dBm BTxlv = Transmit level of Base side
+modem in dBm x = User defined transmit level Driver = Transmit level defined in cellular
+phone driver.
+
+</pre>
+<a name="_Toc343068296"></a><a name="_Toc347715550"></a>
+<p class="bodytext"><b>
+<a name="RTFToC121">3.8
+AT COMMAND RESULT CODES</a>
+</b></p>
+The modem responds to commands from the DTE and to activity on the line by
+signalling to the DTE in the form of result codes. The result codes that the
+modem can send are described below.<p>
+Two forms of each result code are available: long-form, an English-like
+"verbose" response, and short-form, a data-like numeric response (included in
+parentheses following the long-form). The long-form code is preceded and
+terminated by the sequence < CR> < LF>. The short-form is
+terminated by < CR>, only with no preceding sequence.<p>
+If result messages are suppressed, nothing is returned to the DTE. The
+long-form results codes can be modified by the OEM through the ConfigurACE
+Configuration Utility Program. (See ConfigurACE description.)
+<a name="_Toc343068297"></a><a name="_Toc347715551"></a>
+<p class="bodytext"><i>
+<a name="RTFToC122">OK</a>
+(0)
+</i></p>
+The OK code is returned by the modem to acknowledge execution of a command line.
+<a name="_Toc343068298"></a><a name="_Toc347715552"></a>
+<p class="bodytext"><i>
+<a name="RTFToC123">CONNECT</a>
+(1)
+</i></p>
+The modem will send this result code upon connecting when:<p>
+1. The line speed is 300 bps and the modem has been instructed to report the
+line speed to the DTE upon connecting, or<p>
+2. The DTE speed is 300 bps and the modem has been instructed to report the DTE
+speed to the DTE upon connecting, or<p>
+3. The range of result code responses is restricted by the X command such that
+no speed reporting is allowed.
+<a name="_Toc343068299"></a><a name="_Toc347715553"></a>
+<p class="bodytext"><i>
+<a name="RTFToC124">RING</a>
+(2)
+</i></p>
+The modem sends this result code when incoming ringing is detected on the line.
+What qualifies as a ring signal is determined by country-dependent parameters,
+modifiable through ConfigurACE.<p>
+When cellular interface is selected, RING indicates that the cellular phone is
+receiving an incoming call.
+<a name="_Toc343068300"></a><a name="_Toc347715554"></a>
+<p class="bodytext"><i>
+<a name="RTFToC125">NO
+CARRIER</a> (3)
+</i></p>
+The modem sends this result code when attempting to establish a call if:<p>
+1. Ringback is detected and later ceases but no carrier is detected within the
+period of time determined by register S7, or<p>
+2. No ringback is detected within the period of time determined by register
+S7.<p>
+This result code is also used when the modem auto-disconnects due to loss of
+carrier.<p>
+Under X0, if busy tone detection is enforced, this result code is used as a
+response to the detection of busy or circuit busy. Under X0, if dial tone
+detection is enforced or selected, this result code is used to indicate that
+dial tone has not been detected.
+<a name="_Toc343068301"></a><a name="_Toc347715555"></a>
+<p class="bodytext"><i>
+<a name="RTFToC126">ERROR</a>
+(4)
+</i></p>
+The modem returns this result code if the command line contains a syntax error
+or it is unable to execute a command contained in the command line. It is
+issued if a command does not exist or if the parameter supplied is outside the
+permitted range.<p>
+Under X0, X1, X2, and X3, this result is used instead of DELAYED and BLACKLISTED.
+<a name="_Toc343068302"></a><a name="_Toc347715556"></a>
+<p class="bodytext"><i>
+<a name="RTFToC127">CONNECT
+1200</a> (5)
+</i></p>
+For X1, X2, X3, and X4, the modem sends this result code when:<p>
+1. The line speed is 1200 bps and the modem has been instructed to report the
+line speed to the DTE upon connecting, or<p>
+2. The DTE speed is 1200 bps and the modem has been instructed to report the
+DTE speed to the DTE upon connecting.<p>
+(Also, see the W command.)
+<a name="_Toc343068303"></a><a name="_Toc347715557"></a>
+<p class="bodytext"><i>
+<a name="RTFToC128">NO
+DIALTONE</a> (6)
+</i></p>
+For X2 and X4, the modem sends this result code if it has been instructed to
+wait for dial tone during dialing but none is received.<p>
+When cellular phone interface is selected, NO DIALTONE indicates that cellular
+service is not currently available.
+<a name="_Toc343068304"></a><a name="_Toc347715558"></a>
+<p class="bodytext"><i>
+<a name="RTFToC129">BUSY</a>
+(7)
+</i></p>
+For X3 and X4, if busy tone detection is enforced, the modem sends this result
+code when attempting to originate a call if the busy (engaged) signal is
+detected on the line.
+<a name="_Toc343068305"></a><a name="_Toc347715559"></a>
+<p class="bodytext"><i>
+<a name="RTFToC130">NO
+ANSWER</a> (8)
+</i></p>
+The modem sends this result code when attempting to originate a call if a
+continuous ringback signal is detected on the line until the expiration of the
+timer S7.
+<a name="_Toc343068306"></a><a name="_Toc347715560"></a>
+<p class="bodytext"><i>
+<a name="RTFToC131">CONNECT
+0600</a> (9)
+</i></p>
+For X1, X2, X3, and X4, the modem sends this result code when:<p>
+1. The line speed is 600 bps and the modem has been instructed to report the
+line speed to the DTE upon connecting, or<p>
+2. The DTE speed is 600 bps and the modem has been instructed to report the DTE
+speed to the DTE upon connecting.
+<a name="_Toc343068307"></a><a name="_Toc347715561"></a>
+<p class="bodytext"><i>
+<a name="RTFToC132">CONNECT
+2400</a> (10)
+</i></p>
+For X1, X2, X3, and X4, the modem sends this result code when:<p>
+1. The line speed is 2400 bps and the modem has been instructed to report the
+line speed to the DTE upon connecting, or<p>
+2. The DTE speed is 2400 bps and the modem has been instructed to report the
+DTE speed to the DTE upon connecting.
+<a name="_Toc343068308"></a><a name="_Toc347715562"></a>
+<p class="bodytext"><i>
+<a name="RTFToC133">CONNECT
+4800</a> (11)
+</i></p>
+For X1, X2, X3, and X4, the modem sends this result code when:<p>
+1. The line speed is 4800 bps and the modem has been instructed to report the
+line speed to the DTE upon connecting, or<p>
+2. The DTE speed is 4800 bps and the modem has been instructed to report the
+DTE speed to the DTE upon connecting.
+<a name="_Toc343068309"></a><a name="_Toc347715563"></a>
+<p class="bodytext"><i>
+<a name="RTFToC134">CONNECT
+9600</a> (12)
+</i></p>
+For X1, X2, X3, and X4, the modem sends this result code when:<p>
+1. The line speed is 9600 bps and the modem has been instructed to report the
+line speed to the DTE upon connecting, or<p>
+2. The DTE speed is 9600 bps and the modem has been instructed to report the
+DTE speed to the DTE upon connecting.
+<a name="_Toc343068310"></a><a name="_Toc347715564"></a>
+<p class="bodytext"><i>
+<a name="RTFToC135">CONNECT
+7200</a> (13)
+</i></p>
+For X1, X2, X3, and X4, the modem sends this result code when:<p>
+1. The line speed is 7200 bps and the modem has been instructed to report the
+line speed to the DTE upon connecting, or<p>
+2. The DTE speed is 7200 bps and the modem has been instructed to report the
+DTE speed to the DTE upon connecting.
+<a name="_Toc343068311"></a><a name="_Toc347715565"></a>
+<p class="bodytext"><i>
+<a name="RTFToC136">CONNECT
+12000</a> (14)
+</i></p>
+For X1, X2, X3, and X4, the modem sends this result code when:<p>
+1. The line speed is 12000 bps and the modem has been instructed to report the
+line speed to the DTE upon connecting, or<p>
+2. The DTE speed is 12000 bps and the modem has been instructed to report the
+DTE speed to the DTE upon connecting.
+<a name="_Toc343068312"></a><a name="_Toc347715566"></a>
+<p class="bodytext"><i>
+<a name="RTFToC137">CONNECT
+14400</a> (15)
+</i></p>
+For X1, X2, X3, and X4, the modem sends this result code when:<p>
+1. The line speed is 14400 bps and the modem has been instructed to report the
+line speed to the DTE upon connecting, or<p>
+2. The DTE speed is 14400 bps and the modem has been instructed to report the
+DTE speed to the DTE upon connecting.
+<a name="_Toc343068313"></a><a name="_Toc347715567"></a>
+<p class="bodytext"><i>
+<a name="RTFToC138">CONNECT
+19200</a> (16)
+</i></p>
+For X1, X2, X3, and X4, the modem sends this result code when:<p>
+1. The line speed is 19200 bps and the modem has been instructed to report the
+line speed to the DTE upon connecting, or<p>
+2. The DTE speed is 19200 bps and the modem has been instructed to report the
+DTE speed to the DTE upon connecting.
+<a name="_Toc343068314"></a><a name="_Toc347715568"></a>
+<p class="bodytext"><i>
+<a name="RTFToC139">CONNECT
+38400</a> (17)
+</i></p>
+For X1, X2, X3, and X4, the modem sends this result code upon connecting when
+the DTE speed is 38400 bps and the modem has been instructed to report the DTE
+speed to the DTE upon connecting.
+<a name="_Toc343068315"></a><a name="_Toc347715569"></a>
+<p class="bodytext"><i>
+<a name="RTFToC140">CONNECT
+57600</a> (18)
+</i></p>
+For X1, X2, X3, and X4, the modem sends this result code upon connecting when
+the DTE speed is 57600 bps and the modem has been instructed to report the DTE
+speed to the DTE upon connecting.
+<a name="_Toc343068316"></a><a name="_Toc347715570"></a>
+<p class="bodytext"><i>
+<a name="RTFToC141">CONNECT
+115200</a> (19)
+</i></p>
+For X1, X2, X3, and X4, the modem sends this result code upon connecting when
+the DTE speed is 115200 bps and the modem has been instructed to report the DTE
+speed to the DTE upon connecting.
+<a name="_Toc343068317"></a><a name="_Toc347715571"></a>
+<p class="bodytext"><i>
+<a name="RTFToC142">CONNECT
+75TX/1200RX</a> (22)
+</i></p>
+For X1, X2, X3, and X4, the modem returns this result code upon establishing a
+V.23 originate connection when the modem has been instructed to report the DCE
+speed upon connection.
+<a name="_Toc343068318"></a><a name="_Toc347715572"></a>
+<p class="bodytext"><i>
+<a name="RTFToC143">CONNECT
+1200TX/75RX</a> (23)
+</i></p>
+For X1, X2, X3, and X4, the modem returns this result code upon establishing a
+V.23 answer connection when the modem has been instructed to report the DCE
+speed upon connection.
+<a name="_Toc343068319"></a><a name="_Toc347715573"></a>
+<p class="bodytext"><i>
+<a name="RTFToC144">DELAYED</a>
+(24)
+</i></p>
+For X4, the modem returns this result code when a call fails to connect and the
+number dialed is considered 'delayed' due to country blacklisting requirements.
+<a name="_Toc343068320"></a><a name="_Toc347715574"></a>
+<p class="bodytext"><i>
+<a name="RTFToC145">BLACKLISTED</a>
+(32)
+</i></p>
+For X4, the modem returns this result code when a call fails to connect and the
+number dialed is considered 'blacklisted'.
+<a name="_Toc343068321"></a><a name="_Toc347715575"></a>
+<p class="bodytext"><i>
+<a name="RTFToC146">FAX</a>
+(33)
+</i></p>
+The modem returns this result code when a fax modem connection is established
+in a facsimile mode.
+<a name="_Toc343068322"></a><a name="_Toc347715576"></a>
+<p class="bodytext"><i>
+<a name="RTFToC147">DATA</a>
+(35)
+</i></p>
+The modem returns this result code when a data modem connection is established
+in a facsimile mode.
+<a name="_Toc343068323"></a><a name="_Toc347715577"></a>
+<p class="bodytext"><i>
+<a name="RTFToC148">CARRIER
+300</a> (40)
+</i></p>
+The modem returns this result code when a 0-300 bps data rate has been detected
+on the line and carrier reporting has been enabled. (See S95 and Xn.)
+<a name="_Toc343068324"></a><a name="_Toc347715578"></a>
+<p class="bodytext"><i>
+<a name="RTFToC149">CARRIER
+1200/75</a> (44)
+</i></p>
+The modem sends this result code when the V.23 backward channel carrier has
+been detected on the line and carrier reporting has been enabled. (See S95 and
+Xn.)
+<a name="_Toc343068325"></a><a name="_Toc347715579"></a>
+<p class="bodytext"><i>
+<a name="RTFToC150">CARRIER
+75/1200</a> (45)
+</i></p>
+The modem sends this result code when the V.23 forward channel carrier has been
+detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
+<a name="_Toc343068326"></a><a name="_Toc347715580"></a>
+<p class="bodytext"><i>
+<a name="RTFToC151">CARRIER
+1200</a> (46)
+</i></p>
+The modem sends this result code when a 1200 bps data rate has been detected on
+the line and carrier reporting has been enabled. (See S95 and Xn.)
+<a name="_Toc343068327"></a><a name="_Toc347715581"></a>
+<p class="bodytext"><i>
+<a name="RTFToC152">CARRIER
+2400</a> (47)
+</i></p>
+The modem sends this result code when a 2400 bps data rate has been detected on
+the line and carrier reporting has been enabled. (See S95 and Xn.)
+<a name="_Toc343068328"></a><a name="_Toc347715582"></a>
+<p class="bodytext"><i>
+<a name="RTFToC153">CARRIER
+4800</a> (48)
+</i></p>
+The modem sends this result code when a 4800 bps data rate has been detected on
+the line and carrier reporting has been enabled. (See S95 and Xn.)
+<a name="_Toc343068329"></a><a name="_Toc347715583"></a>
+<p class="bodytext"><i>
+<a name="RTFToC154">CARRIER
+7200</a> (49)
+</i></p>
+The modem sends this result code when a 7200 bps data rate has been detected on
+the line and carrier reporting has been enabled. (See S95 and Xn.)
+<a name="_Toc343068330"></a><a name="_Toc347715584"></a>
+<p class="bodytext"><i>
+<a name="RTFToC155">CARRIER
+9600</a> (50)
+</i></p>
+The modem sends this result code when a 9600 bps data rate has been detected on
+the line and carrier reporting has been enabled. (See S95 and Xn.)
+<a name="_Toc343068331"></a><a name="_Toc347715585"></a>
+<p class="bodytext"><i>
+<a name="RTFToC156">CARRIER
+12000</a> (51)
+</i></p>
+The modem sends this result code when a 12000 bps data rate has been detected
+on the line and carrier reporting has been enabled. (See S95 and Xn.)
+<a name="_Toc343068332"></a><a name="_Toc347715586"></a>
+<p class="bodytext"><i>
+<a name="RTFToC157">CARRIER
+14400</a> (52)
+</i></p>
+The modem sends this result code when a 14400 bps data rate has been detected
+on the line and carrier reporting has been enabled. (See S95 and Xn.)
+<a name="_Toc343068333"></a><a name="_Toc347715587"></a>
+<p class="bodytext"><i>
+<a name="RTFToC158">CARRIER
+16800</a> (53)
+</i></p>
+The modem sends this result code when a 16800 bps data rate has been detected
+on the line and carrier reporting has been enabled. (See S95 and Xn.)
+<a name="_Toc343068334"></a><a name="_Toc347715588"></a>
+<p class="bodytext"><i>
+<a name="RTFToC159">CARRIER
+19200</a> (54)
+</i></p>
+The modem sends this result code when a 19200 bps data rate has been detected
+on the line and carrier reporting has been enabled. (See S95 and Xn.)
+<a name="_Toc343068335"></a><a name="_Toc347715589"></a>
+<p class="bodytext"><i>
+<a name="RTFToC160">CARRIER
+21600</a> (55)
+</i></p>
+The modem sends this result code when a 21600 bps data rate has been detected
+on the line and carrier reporting has been enabled. (See S95 and Xn.)
+<a name="_Toc343068336"></a><a name="_Toc347715590"></a>
+<p class="bodytext"><i>
+<a name="RTFToC161">CARRIER
+24000</a> (56)
+</i></p>
+The modem sends this result code when a 24000 bps data rate has been detected
+on the line and carrier reporting has been enabled. (See S95 and Xn.)
+<a name="_Toc343068337"></a><a name="_Toc347715591"></a>
+<p class="bodytext"><i>
+<a name="RTFToC162">CARRIER
+26400</a> (57)
+</i></p>
+The modem sends this result code when a 26400 bps data rate has been detected
+on the line and carrier reporting has been enabled. (See S95 and Xn.)
+<a name="_Toc343068338"></a><a name="_Toc347715592"></a>
+<p class="bodytext"><i>
+<a name="RTFToC163">CARRIER
+28800</a> (58)
+</i></p>
+The modem sends this result code when a 28800 bps data rate has been detected
+on the line and carrier reporting has been enabled. (See S95 and Xn.)
+<a name="_Toc343068339"></a><a name="_Toc347715593"></a>
+<p class="bodytext"><i>
+<a name="RTFToC164">CONNECT
+16800</a> (59)
+</i></p>
+For X1, X2, X3, and X4, the modem returns this result code upon connecting when
+the DTE speed is 16800 bps and the modem has been instructed to report the DTE
+speed upon connecting.
+<a name="_Toc343068340"></a><a name="_Toc347715594"></a>
+<p class="bodytext"><i>
+<a name="RTFToC165">CONNECT
+21600</a> (61)
+</i></p>
+For X1, X2, X3, and X4, the modem returns this result code upon connecting when
+the DTE speed is 21600 bps and the modem has been instructed to report the DTE
+speed upon connecting.
+<a name="_Toc343068341"></a><a name="_Toc347715595"></a>
+<p class="bodytext"><i>
+<a name="RTFToC166">CONNECT
+24000</a> (62)
+</i></p>
+For X1, X2, X3, and X4, the modem returns this result code upon connecting when
+the DTE speed is 24000 bps and the modem has been instructed to report the DTE
+speed upon connecting.
+<a name="_Toc343068342"></a><a name="_Toc347715596"></a>
+<p class="bodytext"><i>
+<a name="RTFToC167">CONNECT
+26400</a> (63)
+</i></p>
+For X1, X2, X3, and X4, the modem returns this result code upon connecting when
+the DTE speed is 26400 bps and the modem has been instructed to report the DTE
+speed upon connecting.
+<a name="_Toc343068343"></a><a name="_Toc347715597"></a>
+<p class="bodytext"><i>
+<a name="RTFToC168">CONNECT
+28800</a> (64)
+</i></p>
+For X1, X2, X3, and X4, the modem returns this result code upon connecting when
+the DTE speed is 28800 bps and the modem has been instructed to report the DTE
+speed upon connecting.
+<a name="_Toc343068344"></a><a name="_Toc347715598"></a>
+<p class="bodytext"><i>
+<a name="RTFToC169">COMPRESSION:
+CLASS 5</a> (66)
+</i></p>
+This message is sent to the DTE when the modem has connected in MNP Class 5 and
+COMPRESSION message reporting has been enabled. (See S95 and Xn.)
+<a name="_Toc343068345"></a><a name="_Toc347715599"></a>
+<p class="bodytext"><i>
+<a name="RTFToC170">COMPRESSION:
+V.42 bis</a> (67)
+</i></p>
+This message is sent to the DTE when the modem has connected in V.42 bis and
+COMPRESSION message reporting has been enabled. (See S95 and Xn.)
+<a name="_Toc343068346"></a><a name="_Toc347715600"></a>
+<p class="bodytext"><i>
+<a name="RTFToC171">COMPRESSION:
+NONE</a> (69)
+</i></p>
+This message is sent to the DTE when the modem has connected without data
+compression and COMPRESSION message reporting has been enabled. (See S95 and Xn.)
+<a name="_Toc343068347"></a><a name="_Toc347715601"></a>
+<p class="bodytext"><i>
+<a name="RTFToC172">PROTOCOL:
+NONE</a> (70)
+</i></p>
+This message is sent to the DTE when the modem has connected without any form
+of error correction, and the PROTOCOL message reporting has been enabled. (See
+S95 and Xn.)
+<a name="_Toc343068348"></a><a name="_Toc347715602"></a>
+<p class="bodytext"><i>
+<a name="RTFToC173">PROTOCOL:
+LAPM</a> (77)
+</i></p>
+This message is sent to the DTE when the modem has connected in the V.42 LAPM
+mode of error correction, and PROTOCOL message reporting has been enabled. (See
+S95 and Xn.)
+<a name="_Toc343068349"></a><a name="_Toc347715603"></a>
+<p class="bodytext"><i>
+<a name="RTFToC174">PROTOCOL:
+ALT</a> (80)
+</i></p>
+This message is sent to the DTE when the modem has connected in the MNP mode of
+error correction, and PROTOCOL message reporting has been enabled. (See S95 and
+Xn.)
+<a name="_Toc343068350"></a><a name="_Toc347715604"></a>
+<p class="bodytext"><i>
+<a name="RTFToC175">PROTOCOL:
+ALT-CELLULAR</a> (81)
+</i></p>
+This message is sent to the DTE when the modem has connected in the MNP 10 mode
+and cellular power level adjustment is enabled (")M1 or )M2").(See S95 and Xn.)
+<a name="_Toc343068351"></a><a name="_Toc347715605"></a>
+<p class="bodytext"><i>
+<a name="RTFToC176">+FCERROR</a>
+(+F4)
+</i></p>
+This message is sent to the DTE when high speed fax data (V.27, V.29, V.33, or
+V.17) is expected and a V.21 signal is received.<p>
+
+<a name="_Toc343068352"></a><a name="_Toc347715606"></a>
+<p class="subheadlinktext">
+<a name="RTFToC177">4. S-REGISTERS</a>
+</p>
+The S-Registers are summarized in Table 4-1 along with their default values;
+registers denoted with an '*' may be stored in one of the two user profiles by
+entering the &Wn command. One of these profiles may be loaded at any time
+by using the Zn command. Registers or register fields quoted as "reserved" are
+reserved for current or future use by the firmware, or are permanently
+overridden by PTT limitations. For the latter, control of the equivalent
+functionality is available with ConfigurACE Call Progress and Blacklisting
+options. <p>
+All bit-mapped registers are read-only. The appropriate AT command which
+controls the relevant bits in the S-Register should be used to change the value.
+<a name="_Toc343068353"></a><a name="_Toc347715607"></a>
+<p class="bodytext"><b>
+<a name="RTFToC178">4.1
+FACTORY DEFAULTS</a>
+</b></p>
+The factory default values are stored in ROM and are loaded into the active
+configuration at power up or by the ATZn command. In addition, the designated
+default profile is subsequently loaded, and may change some of the factory
+default values. The designated default profile can be changed by entering the
+&Yn command where n is one of the two possible user profiles.<p>
+The defaults shown are those used by Rockwell in factory profiles zero and one.
+These may be overwritten by the OEM with ConfigurACE prior to placing the
+firmware in PROM. Minimum and maximum values may also be imposed by ConfigurACE
+in response to country PTT requirements.<p>
+The default values shown in Table 4-1 may vary by modem firmware configuration.
+Consult the MCU firmware release notes for exact configuration.<p>
+The factory default values may be loaded at any time by entering the &Fn
+command.
+<a name="_Ref345291535"></a><a name="_Toc347715839"></a><p>
+<b>Table 4-1. S-Register Summary</b>
+
+<pre>
+Register Function Range Units Saved Default**
+S0 Rings to Auto-Answer 0-255 rings * 0
+S1 Ring Counter 0-255 rings 0
+S2 Escape Character 0-255 ASCII * 43
+S3 Carriage Return Character 0-127 ASCII 13
+S4 Line Feed Character 0-127 ASCII 10
+S5 Backspace Character 0-255 ASCII 8
+S6 Wait Time for Dial Tone 2-255 s * 2
+S7 Wait Time for Carrier 1-255 s * 50
+S8 Pause Time for Dial Delay 0-255 s * 2
+ Modifier
+S9 Carrier Detect Response Time 1-255 0.1 s * 6
+S10 Carrier Loss Disconnect Time 1-255 0.1 s * 14
+S11 DTMF Tone Duration 50-255 0.001 s * 95
+S12 Escape Prompt Delay 0-255 0.02 s * 50
+S13 Reserved - - -
+S14 General Bit Mapped Options - - * 138 (8Ah)
+ Status
+S15 Reserved - - -
+S16 Test Mode Bit Mapped - - 0
+ Options Status (&T)
+S17 Reserved - - -
+S18 Test Timer 0-255 s * 0
+S19 AutoSync Options - - 0
+S20 AutoSync HDLC Address or 0-255 - * 0
+ BSC Sync Character
+S21 V.24/General Bit Mapped - - * 52 (34h)
+ Options Status
+S22 Speaker/Results Bit Mapped - - * 117 (75h)
+ Options Status
+S23 General Bit Mapped Options - * 62 (3Dh)
+ Status
+S24 Sleep Inactivity Timer 0-255 s * 0
+S25 Delay to DTR Off 0-255 s or 5
+ 0.01 s
+S26 RTS-to-CTS Delay 0-255 0.01 s 1
+S27 General Bit Mapped Options - - * 73 (49h)
+ Status
+S28 General Bit-Mapped Options - - * 0
+ Status
+S29 Flash Dial Modifier Time 0-255 10 ms 70
+S30 Disconnect Inactivity Timer 0-255 10 s 0
+S31 General Bit-Mapped Options - - * 194 (C2h)
+ Status
+S32 XON Character 0-255 ASCII 17 (11h)
+S33 XOFF Character 0-255 ASCII 19 (13h)
+S34-S35 Reserved - - -
+S36 LAPM Failure Control - - * 7
+S37 Line Connection Speed - - * 0
+S38 Delay Before Forced Hangup 0-255 s 20
+S39 Flow Control Bit Mapped - - * 3
+ Options Status
+S40 General Bit-Mapped Options - - * 104 (68h)
+ Status
+S41 General Bit-Mapped Options - - * 195 (C3h)
+ Status
+S42-S45 Reserved - - -
+S46 Data Compression Control - - * 138
+S48 V.42 Negotiation Control - - * 7
+S82 LAPM Break Control - - 128(40h)
+S86 Call Failure Reason Code 0-255 - -
+S91 PSTN Transmit Attenuation 0-15 dBm 10 (Country dependent)
+ Level
+S92 Fax Transmit Attenuation 0-15 dBm 10 (Country dependent)
+ Level
+S95 Result Code Messages Control - - * 0
+* Register value may be stored in one of two user profiles with the &W command. ** Default
+values may be modified using ConfigurACE.
+<a name="_Toc343068354"></a><a name="_Toc347715608"></a>
+</pre>
+<p class="bodytext"><b>
+<a name="RTFToC179">4.2
+S-REGISTER DEFINITIONS</a></a>
+</a><a name="_Toc343068355"></a><a name="_Toc347715609"></a></b></p>
+<p class="bodytext"><i>
+<a name="RTFToC180">S0
+- Number of Rings to Auto-Answer</a></a>
+</a></i></p>
+Sets the number of the rings required before the modem automatically answers a
+call. Setting this register to zero disables auto-answer mode.<p>
+Range: 0-255 rings<p>
+Default: 0
+<a name="_Toc343068356"></a><a name="_Toc347715610"></a>
+<p class="bodytext"><i>
+<a name="RTFToC181">S1
+- Ring Counter</a>
+</i></p>
+S1 is incremented each time the modem detects a ring signal on the telephone
+line. S1 is cleared if no rings occur over an eight second interval.<p>
+Range: 0-255 rings<p>
+Default: 0
+<a name="_Toc343068357"></a><a name="_Toc347715611"></a>
+<p class="bodytext"><i>
+<a name="RTFToC182">S2
+- Escape Character</a>
+</i></p>
+S2 holds the decimal value of the ASCII character used as the escape character.
+The default value corresponds to an ASCII '+'. A value over 127 disables the
+escape process, i.e., no escape character will be recognized.<p>
+Range: 0-255, ASCII decimal<p>
+Default: 43 (+)
+<a name="_Toc343068358"></a><a name="_Toc347715612"></a>
+<p class="bodytext"><i>
+<a name="RTFToC183">S3
+- Carriage Return Character</a>
+</i></p>
+Sets the command line and result code terminator character. Pertains to
+asynchronous operation only. <p>
+Range: 0-127, ASCII decimal<p>
+Default: 13 (Carriage Return)
+<a name="_Toc343068359"></a><a name="_Toc347715613"></a>
+<p class="bodytext"><i>
+<a name="RTFToC184">S4
+- Line Feed Character</a>
+</i></p>
+Sets the character recognized as a line feed. Pertains to asynchronous
+operation only. The Line Feed control character is output after the Carriage
+Return control character if verbose result codes are used.<p>
+Range: 0-127, ASCII decimal<p>
+Default: 10 (Line Feed)
+<a name="_Toc343068360"></a><a name="_Toc347715614"></a>
+<p class="bodytext"><i>
+<a name="RTFToC185">S5
+- Backspace Character</a>
+</i></p>
+Sets the character recognized as a backspace. Pertains to asynchronous
+operation only. The modem will not recognize the Backspace character if it is
+set to a value that is greater than 32 ASCII. This character can be used to
+edit a command line. When the echo command is enabled, the modem echoes back to
+the local DTE the Backspace character, an ASCII space character and a second
+Backspace character; this means a total of three characters are transmitted
+each time the modem processes the Backspace character.<p>
+Range: 0-32, ASCII decimal<p>
+Default: 8 (Backspace)
+<a name="_Toc343068361"></a><a name="_Toc347715615"></a>
+<p class="bodytext"><i>
+<a name="RTFToC186">S6
+- Wait Time for Dial Tone Before Blind Dialing, or After "W" Dial Modifier
+(W-Class Models)</a>
+</i></p>
+1. Sets the length of time, in seconds, that the modem will wait before
+starting to dial after going off-hook when blind dialing. This operation,
+however, may be affected by some ATX options according to country restrictions.
+The "Wait for Dial Tone" call progress feature (W dial modifier in the dial
+string) will override the value in register S6. <p>
+2. For W-class models, S6 sets the length of time, in seconds, that the modem
+will wait for dial tone when encountering a "W" dial modifier before returning
+NO DIAL TONE result code.<p>
+The modem always pauses for a minimum of 2 seconds, even if the value of S6 is
+less than 2 seconds. <p>
+Range: 2-255 seconds<p>
+Default: 2
+<a name="_Toc343068362"></a><a name="_Toc347715616"></a>
+<p class="bodytext"><i>
+<a name="RTFToC187">S7
+- Wait Time For Carrier After Dial, For Silence, or For Dial Tone After "W"
+Dial Modifier (US Models)</a>
+</i></p>
+1. Sets the length of time, in seconds, that the modem will wait for carrier
+before hanging up. The timer is started when the modem finishes dialing
+(originate), or 2 seconds after going off-hook (answer). In originate mode, the
+timer is reset upon detection of answer tone if allowed by country
+restrictions.<p>
+2. Sets the length of time, in seconds, that modem will wait for silence when
+encountering the @ dial modifier before continuing with the next dial string
+parameter.<p>
+3. For US models, S7 sets the length of time, in seconds, that the modem will
+wait for dial tone when encountering a "W" dial modifier before continuing with
+the next dial string parameter.<p>
+Range: 1-255 seconds<p>
+Default: 50
+<a name="_Toc343068363"></a><a name="_Toc347715617"></a>
+<p class="bodytext"><i>
+<a name="RTFToC188">S8
+- Pause Time For Dial Delay</a>
+</i></p>
+Sets the time, in seconds, that the modem must pause when the "," dial modifier
+is encountered in the dial string.<p>
+Range: 0-255 seconds<p>
+Default: 2
+<a name="_Toc343068364"></a><a name="_Toc347715618"></a>
+<p class="bodytext"><i>
+<a name="RTFToC189">S9
+- Carrier Detect Response Time</a>
+</i></p>
+Sets the time, in tenths of a second, that the carrier must be present before
+the modem considers it valid and turns on RLSD. As this time is increased,
+there is less chance to detect a false carrier due to noise from the telephone
+line.<p>
+Range: 1-255 tenths of a second<p>
+Default: 6 (0.6 second)
+<a name="_Toc343068365"></a><a name="_Toc347715619"></a>
+<p class="bodytext"><i>
+<a name="RTFToC190">S10
+- Lost Carrier To Hang Up Delay</a>
+</i></p>
+Sets the length of time, in tenths of a second, that the modem waits before
+hanging up after a loss of carrier. This allows for a temporary carrier loss
+without causing the local modem to disconnect. When register S10 is set to 255,
+the modem functions as if a carrier is always present.<p>
+The actual interval the modem waits before disconnecting is the value in
+register S10 minus the value in register S9. Therefore, the S10 value must be
+greater than the S9 value or else the modem disconnects before it recognizes
+the carrier.<p>
+Range: 1-255 tenths of a second<p>
+Default: 14 (1.4 seconds)
+<a name="_Toc343068366"></a><a name="_Toc347715620"></a>
+<p class="bodytext"><i>
+<a name="RTFToC191">S11
+- DTMF Tone Duration</a>
+</i></p>
+Sets the duration of tones in DTMF dialing (US models only). This value has no
+effect on pulse dialing.<p>
+For W-class models, this parameter is a country parameter loaded by
+ConfigurACE.<p>
+Range: 50-255 milliseconds<p>
+Default: 95 (95 milliseconds)
+<a name="_Toc343068367"></a><a name="_Toc347715621"></a>
+<p class="bodytext"><i>
+<a name="RTFToC192">S12
+- Escape Prompt Delay (EPD)</a>
+</i></p>
+Defines the maximum period, in fiftieths of a second, allowed between receipt
+of the last character of the three escape character sequence from the DTE and
+sending of the OK result code to the DTE. If any characters are detected during
+this time, the OK will not be sent. Note that sending of the OK result code
+does not affect entry into command mode. (See 3.1.3.)<p>
+Range: 0-255 1/50 of a second<p>
+Default: 50 (1 second)
+<a name="_Toc343068368"></a><a name="_Toc347715622"></a>
+<p class="bodytext"><i>
+<a name="RTFToC193">S13
+- Reserved</a>
+<a name="_Toc343068369"><a name="_Toc347715623"><br>
+<a name="RTFToC194">S14
+- General Bit Mapped Options Status</a></a>
+</a></i></p>
+Indicates the status of command options. <p>
+Default: 138 (8Ah) (10001010b)<p>
+Bit 0 This bit is ignored. <p>
+Bit 1 Command echo (En)<p>
+0 = Disabled (E0)<p>
+1 = Enabled (E1) (Default.)<p>
+Bit 2 Quiet mode (Qn)<p>
+0 = Send result codes (Q0) (Default.)<p>
+1 = Do not send result codes (Q1)<p>
+Bit 3 Result codes (Vn)<p>
+0 = Numeric (V0) <p>
+1 = Verbose (V1) (Default.)<p>
+Bit 4 Reserved<p>
+Bit 5 Tone (T)/Pulse (P)<p>
+0 = Tone (T) (Default.)<p>
+1 = Pulse (P)<p>
+Bit 6 Reserved<p>
+Bit 7 Originate/Answer<p>
+0 = Answer<p>
+1 = Originate (Default.)
+<a name="_Toc343068370"></a><a name="_Toc347715624"></a>
+<p class="bodytext"><i>
+<a name="RTFToC195">S15
+- Reserved</a>
+<a name="_Toc343068371"><a name="_Toc347715625"><br>
+<a name="RTFToC196">S16
+- General Bit Mapped Test Options Status</a></a>
+</a></i></p>
+Indicates the test in progress status. <p>
+Default: 0<p>
+Bit 0 Local analog loopback<p>
+0 = Disabled (Default.)<p>
+1 = Enabled (&T1)<p>
+Bit 1 Not used<p>
+Bit 2 Local digital loopback<p>
+0 = Disabled (Default.)<p>
+1 = Enabled (&T3)<p>
+Bit 3 Remote digital loopback (RDL) status <p>
+0 = Modem not in RDL (Default.)<p>
+1 = RDL in progress<p>
+Bit 4 RDL requested (AT&T6)<p>
+0 = RDL not requested (Default.)<p>
+1 = RDL requested (&T6)<p>
+Bit 5 RDL with self test<p>
+0 = Disabled (Default.)<p>
+1 = Enabled (&T7)<p>
+Bit 6 Local analog loopback (LAL) with self test<p>
+0 = Disabled (Default.)<p>
+1 = Enabled (&T8)<p>
+Bit 7 Not used
+<a name="_Toc343068372"></a><a name="_Toc347715626"></a>
+<p class="bodytext"><i>
+<a name="RTFToC197">S17
+- Reserved</a>
+<a name="_Toc343068373"><a name="_Toc347715627"><br>
+<a name="RTFToC198">S18
+- Test Timer</a></a>
+</a></i></p>
+Sets the length of time, in seconds, that the modem conducts a test (commanded
+by &Tn) before returning to the command mode. If this register value is
+zero, the test will not automatically terminate; the test must be terminated
+from the command mode by issuing an &T0 or H command. When S18 is non-zero,
+the modem returns the OK message upon test termination.<p>
+Range: 0-255 seconds<p>
+Default: 0
+<a name="_Toc343068374"></a><a name="_Toc347715628"></a>
+<p class="bodytext"><i>
+<a name="RTFToC199">S19
+- AutoSync Bit Mapped Options</a>
+</i></p>
+Defines the options for AutoSync operation (see &Q4 command). S19 must be
+set to the desired value before &Q4 is issued.<p>
+Default: 0<p>
+Bit 0 Reserved<p>
+Bit 1 BSC/HDLC format select<p>
+0 = BSC selected (Default.)<p>
+1 = HDLC selected<p>
+Bit 2 Address detection enable/disable<p>
+0 = Disabled (Default.)<p>
+1 = Enabled<p>
+Bit 3 NRZI/NZI coding select<p>
+0 = NRZI (Default.)<p>
+1 = NZI<p>
+Bit 4 Idle indicator select<p>
+0 = Mark idle (Default.)<p>
+1 = Flag or sync idle<p>
+Bits 5 - 7 Reserved
+<a name="_Toc343068375"></a><a name="_Toc347715629"></a>
+<p class="bodytext"><i>
+<a name="RTFToC200">S20
+- AutoSync HDLC Address or BSC Sync Character</a>
+</i></p>
+Defines the HDLC address (S19 bit 1 = 1) or BSC Sync Character (S19 bit 1 = 0)
+for AutoSync operation (see &Q4 command). S20 must be set to the desired
+value before &Q4 is issued.<p>
+Range: 0-255 <p>
+Default: 0
+<a name="_Toc343068376"></a><a name="_Toc347715630"></a>
+<p class="bodytext"><i>
+<a name="RTFToC201">S21
+- V.24/General Bit Mapped Options Status</a>
+</i></p>
+Indicates the status of command options.<p>
+Default: 52 (34h) (00110100b)<p>
+Bit 0 Set by &Jn command but ignored otherwise.<p>
+0 = &J0 (Default.)<p>
+1 = &J1<p>
+Bit 1 Reserved<p>
+Bit 2 CTS behavior (&Rn)<p>
+0 = CTS tracks RTS (&R0) <p>
+1 = CTS always on (&R1) (Default.)<p>
+Bits 3-4 DTR behavior (&Dn)<p>
+0 = &D0 selected<p>
+1 = &D1 selected<p>
+2 = &D2 selected (Default.)<p>
+3 = &D3 selected<p>
+Bit 5 RLSD (DCD) behavior (&Cn)<p>
+0 = &C0 selected<p>
+1 = &C1 selected (Default.)<p>
+Bit 6 DSR behavior (&Sn)<p>
+0 = &S0 selected (Default.)<p>
+1 = &S1 selected<p>
+Bit 7 Long space disconnect (Yn)<p>
+0 = Y0 (Default.)<p>
+1 = Y1
+<a name="_Toc343068377"></a><a name="_Toc347715631"></a>
+<p class="bodytext"><i>
+<a name="RTFToC202">S22
+- Speaker/Results Bit Mapped Options Status</a>
+</i></p>
+Indicates the status of command options.<p>
+Default: 117 (75h) (01110101b)<p>
+Bits 0-1 Speaker volume (Ln)<p>
+0 = Off (L0)<p>
+1 = Low (L1) (Default.)<p>
+2 = Medium (L2)<p>
+3 = High (L3)<p>
+Bits 2-3 Speaker control (Mn)<p>
+0 = Disabled (M0)<p>
+1 = Off on carrier (M1) (Default.)<p>
+2 = Always on (M2)<p>
+3 = On during handshake (M3)<p>
+Bits 4-6 Limit result codes (Xn)<p>
+0 = X0<p>
+4 = X1<p>
+5 = X2<p>
+6 = X3<p>
+7 = X4 (Default.)<p>
+Bit 7 Reserved
+<a name="_Toc343068378"></a><a name="_Toc347715632"></a>
+<p class="bodytext"><i>
+<a name="RTFToC203">S23
+- General Bit Mapped Options Status</a>
+</i></p>
+Indicates the status of command options.<p>
+Default: 62 (3Dh) (00111110b)<p>
+Bit 0 Grant RDL<p>
+0 = RDL not allowed (&T5) (Default.)<p>
+1 = RDL allowed (&T4) <p>
+Bits 1-3 DTE Rate<p>
+0 = 0 - 300 bps<p>
+1 = 600 bps<p>
+2 = 1200 bps<p>
+3 = 2400 bps<p>
+4 = 4800 bps<p>
+5 = 9600 bps<p>
+6 = 19200 bps<p>
+7 = 38400 bps or higher (Default.)<p>
+Bits 4-5 Assumed DTE parity <p>
+0 = even<p>
+1 = not used<p>
+2 = odd<p>
+3 = none (Default.)<p>
+Bits 6-7 Guard tone (&Gn)<p>
+0 = None (&G0) (Default.)<p>
+1 = None (&G1)<p>
+2 = 1800 Hz (&G2)
+<a name="_Toc343068379"></a><a name="_Toc347715633"></a>
+<p class="bodytext"><i>
+<a name="RTFToC204">S24
+- Sleep Inactivity Timer</a>
+</i></p>
+Sets the length of time, in seconds, that the modem will operate in normal mode
+with no detected telephone line or DTE line activity before entering low-power
+sleep mode. The timer is reset upon any DTE line or telephone line activity. If
+the S24 value is zero, neither DTE line nor telephone inactivity will cause the
+modem to enter the sleep mode. <p>
+Range: 0-255 seconds<p>
+Default: 0
+<a name="_Toc343068380"></a><a name="_Toc347715634"></a>
+<p class="bodytext"><i>
+<a name="RTFToC205">S25
+- Delay To DTR</a>
+</i></p>
+Sets the length of time that the modem will ignore DTR for taking the action
+specified by &Dn. Its units are seconds for synchronous modes and one
+hundredths of a second for other modes.<p>
+Range: 0-255 (1 second for synchronous modes 1; 0.01 second otherwise)<p>
+Default: 5
+<a name="_Toc343068381"></a><a name="_Toc347715635"></a>
+<p class="bodytext"><i>
+<a name="RTFToC206">S26
+- RTS to CTS Delay</a>
+</i></p>
+Sets the time delay, in hundredths of a second, before the modem turns CTS ON
+after detecting an OFF-to-ON transition on RTS when &R0 is commanded.
+Pertains to synchronous operation only. <p>
+Range: 0-255 hundredths of a second<p>
+Default: 1
+<a name="_Toc343068382"></a><a name="_Toc347715636"></a>
+<p class="bodytext"><i>
+<a name="RTFToC207">S27
+- Bit Mapped Options Status</a>
+</i></p>
+Indicates the status of command options.<p>
+Default: 73 (49h) (01001001b) <p>
+Bits 0,1,3 Synchronous/asynchronous selection (&Mn/&Qn)<p>
+<b>3 1 0</b> <p>
+0 0 0 = &M0 or &Q0<p>
+0 0 1 = &M1 or &Q1<p>
+0 1 0 = &M2 or &Q2<p>
+0 1 1 = &M3 or &Q3<p>
+1 0 0 = &Q4<p>
+1 0 1 = &Q5 (Default.)<p>
+1 1 0 = &Q6 <p>
+Bit 2 Leased line control (&Ln)<p>
+0 = Dial up line (&L0) (Default.)<p>
+Bits 4 - 5 Internal clock select (&Xn)<p>
+0 = Internal clock (&X0) (Default.)<p>
+1 = External clock (&X1)<p>
+2 = Slave clock (&X2)<p>
+Bit 6 CCITT/Bell mode select (Bn)<p>
+0 = CCITT mode (B0)<p>
+1 = Bell mode (B1) (Default.)<p>
+Bit 7 - Reserved
+<a name="_Toc343068383"></a><a name="_Toc347715637"></a>
+<p class="bodytext"><i>
+<a name="RTFToC208">S28
+- Bit Mapped Options Status</a>
+</i></p>
+Default: 0&