Longshine LCS-8056C2 User Manual
Commands for Host-Processed Modems
Reference Manual
Doc. No. 100498E
February 9, 2004
Commands for Host-Processed Modems Reference Manual
Revision Record
Revision Date Comments
100498E 2/9/2004 Rev. E release. Supersedes 100498D.
100498D 4/5/2001 Rev. D release. Supersedes 100498C.
100498C (Marked 1118, Rev. 2) 2/5/1999 Rev. C release. Supersedes 100498B and
100498B (Marked 1118, Rev. 1) 9/9/1998 Rev. B release. Supersedes 100498A.
100498A (Marked 1118) 5/30/1997 Rev. A release.
Doc. No. 1163, Rev. 2.
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ii Conexant 100498E
Commands for Host-Processed Modems Reference Manual
Contents
1 Introduction..........................................................................................................................................1-1
1.1 Overview ......................................................................................................................................................................... 1-1
1.1.1 Command Syntax ........................................................................................................................................... 1-1
1.1.2 Command Descriptions .................................................................................................................................. 1-1
2 Syntax and Procedures.........................................................................................................................2-1
2.1 Alphabet.......................................................................................................................................................................... 2-1
2.2 DTE Commands Lines .................................................................................................................................................... 2-1
2.2.1 Command Line General Format...................................................................................................................... 2-1
2.2.2 Command Line Editing ................................................................................................................................... 2-2
2.2.3 Command Line Echo ...................................................................................................................................... 2-2
2.2.4 Repeating a Command Line ........................................................................................................................... 2-2
2.2.5 Types of DTE Commands ............................................................................................................................... 2-2
2.3 Basic Syntax Commands ................................................................................................................................................ 2-3
2.3.1 Basic Syntax Command Format ..................................................................................................................... 2-3
2.3.2 S-Parameters.................................................................................................................................................. 2-3
2.4 Extended Syntax Commands .......................................................................................................................................... 2-4
2.4.1 Command Naming Rules................................................................................................................................ 2-4
2.4.2 Values............................................................................................................................................................. 2-4
Numeric Constants ................................................................................................................................. 2-4
String Constants..................................................................................................................................... 2-5
Compound Values .................................................................................................................................. 2-5
2.4.3 Action Commands .......................................................................................................................................... 2-5
Action Execution Command Syntax........................................................................................................ 2-5
Action Test Command Syntax ................................................................................................................ 2-6
2.4.4 Parameter Commands.................................................................................................................................... 2-6
Parameter Types..................................................................................................................................... 2-6
Parameter Set Command Syntax............................................................................................................ 2-6
Parameter Read Command Syntax......................................................................................................... 2-7
Parameter Test Command Syntax .......................................................................................................... 2-7
2.4.5 Additional Syntax Rules.................................................................................................................................. 2-7
Concatenating Commands after Extended Syntax Commands............................................................... 2-7
Concatenating Commands after Basic Format Commands .................................................................... 2-7
2.5 Issuing Commands......................................................................................................................................................... 2-8
2.6 Executing Commands..................................................................................................................................................... 2-8
2.6.1 Aborting Commands ...................................................................................................................................... 2-8
2.6.2 Handling of Invalid Numbers and S-Parameter Values .................................................................................. 2-9
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2.7
Modem Responses......................................................................................................................................................... 2-9
2.7.1 Responses...................................................................................................................................................... 2-9
2.7.2 Extended Syntax Result Codes ..................................................................................................................... 2-10
2.7.3 +<name>: <compound_value>Information Text Formats for Test Commands............................................ 2-11
Range of Values.................................................................................................................................... 2-11
Compound Range of Values ................................................................................................................. 2-11
3 Data Command Set...............................................................................................................................3-1
3.1 Command Guidelines...................................................................................................................................................... 3-1
3.1.1 Escape Code Sequence................................................................................................................................... 3-1
3.2 Data Commands ............................................................................................................................................................. 3-1
3.2.1 Generic Modem Control ................................................................................................................................. 3-2
Z - Reset to Default Configuration .......................................................................................................... 3-2
+FCLASS - Select Active Service Class................................................................................................... 3-2
+VCID - Caller ID (CID)........................................................................................................................... 3-3
+VRID - Report Retrieved Caller ID (CID)............................................................................................... 3-4
\N - Operating Mode ............................................................................................................................... 3-5
&F - Set to Factory-Defined Configuration ............................................................................................. 3-6
&T - Local Analog Loopback Test .......................................................................................................... 3-6
I - Request Identification Information .................................................................................................... 3-7
+GMI - Request Manufacturer Identification .......................................................................................... 3-8
+GMM - Request Model Identification.................................................................................................... 3-9
+GMR - Request Revision Identification ................................................................................................ 3-9
+GSN - Request Product Serial Number Identification........................................................................... 3-9
+GOI - Request Global Object Identification......................................................................................... 3-10
+GCAP - Request Complete Capabilities List........................................................................................ 3-10
+GCI - Country of Installation............................................................................................................... 3-11
3.2.2 DTE-Modem interface commands................................................................................................................ 3-12
E - Command Echo............................................................................................................................... 3-12
Q - Quiet Results Codes Control........................................................................................................... 3-12
V - Result Code Form ........................................................................................................................... 3-13
W - Connect Message Control.............................................................................................................. 3-13
X - Extended Result Codes ................................................................................................................... 3-14
&C - RLSD Behavior ............................................................................................................................. 3-18
&D - DTR Behavior ............................................................................................................................... 3-19
&K - Flow Control ................................................................................................................................. 3-20
&M - Asynchronous/Synchronous Mode Selection ............................................................................. 3-20
&Q - Sync/Async Mode ........................................................................................................................ 3-21
+IPR - Fixed DTE Rate .......................................................................................................................... 3-22
+IFC - DTE-Modem Local Flow Control ................................................................................................ 3-23
+ILRR - DTE-Modem Local Rate Reporting ......................................................................................... 3-24
3.2.3 Call Control................................................................................................................................................... 3-25
D - Dial.................................................................................................................................................. 3-25
T - Set Tone Dial Default....................................................................................................................... 3-27
P - Set Pulse Dial Default...................................................................................................................... 3-27
A - Answer ............................................................................................................................................ 3-27
H - Disconnect (Hang-Up) .................................................................................................................... 3-28
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O - Return to On-Line Data Mode ......................................................................................................... 3-28
L - Speaker Volume .............................................................................................................................. 3-29
M - Speaker Control ............................................................................................................................. 3-29
&G - Select Guard Tone........................................................................................................................ 3-30
&P - Select Pulse Dial Make/Break Ratio.............................................................................................. 3-30
&V - Display Current Configuration and Stored Profile ........................................................................ 3-31
&W - Store Current Configuration ........................................................................................................ 3-31
*B - Display Blacklisted Numbers ........................................................................................................ 3-32
*D - Display Delayed Numbers............................................................................................................. 3-32
3.2.4 Modulation Control Commands ................................................................................................................... 3-33
+MS - Modulation Selection ................................................................................................................. 3-33
+MR - Modulation Reporting Control................................................................................................... 3-36
%E - Enable/Disable Line Quality Monitor, Auto-Retrain, and Auto-Rate Renegotiation...................... 3-37
3.2.5 Error Control Commands ............................................................................................................................. 3-38
+ES - Error Control and Synchronous Mode Selection ........................................................................ 3-38
+EB - Break Handling in Error Control Operation .................................................................................3-40
+ESR - Selective Repeat ....................................................................................................................... 3-40
+EFCS - 32-bit Frame Check Sequence ................................................................................................ 3-41
+ER - Error Control Reporting .............................................................................................................. 3-42
+ETBM - Call Termination Buffer Management .................................................................................... 3-44
3.2.6 Data Compression Commands..................................................................................................................... 3-45
+DS - Data Compression...................................................................................................................... 3-45
+DS44 - V.44 Compression Select ....................................................................................................... 3-46
+DR - Data Compression Reporting..................................................................................................... 3-47
%C - Enable/Disable Data Compression............................................................................................... 3-48
N - Automode Enable............................................................................................................................ 3-49
3.2.7 V.8/V.8bis Commands.................................................................................................................................. 3-49
+A8E - V.8 and V.8bis Operation Controls ........................................................................................... 3-49
3.2.8 Synchronous Access Mode Commands....................................................................................................... 3-52
+ESA - Configure Synchronous Access Mode...................................................................................... 3-52
+ITF - Transmit Flow Control Thresholds ............................................................................................. 3-54
3.2.9 Diagnostic and Test Commands................................................................................................................... 3-55
#UD – Last Call Status Report .............................................................................................................. 3-55
%TT - PTT Test Command ................................................................................................................... 3-62
3.2.10 V.92 +P and –Q Commands ......................................................................................................................... 3-65
+PCW - Call Waiting Enable.................................................................................................................. 3-65
+PMH - Modem-on-Hold Enable .......................................................................................................... 3-67
+PMHT – Modem-on-Hold Timer ......................................................................................................... 3-68
+PMHR - Initiate Modem-on-Hold........................................................................................................ 3-69
+PIG - PCM Upstream Ignore............................................................................................................... 3-70
+PMHF - V.92 Modem-on-Hold Hook Flash ......................................................................................... 3-70
+PQC - V.92 Phase 1 and Phase 2 Control........................................................................................... 3-71
+PSS - Use Short Sequence ................................................................................................................. 3-72
-QCPC - Force Full Startup Procedure Next Connection....................................................................... 3-73
-QCPS - Enable Quick Connect Profile Save......................................................................................... 3-73
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3.3
S-Parameters................................................................................................................................................................ 3-74
AT=x - Write to Selected S-Parameter.................................................................................................. 3-74
AT? - Read Selected S-Parameter ........................................................................................................ 3-74
Sn - Read/Write S-Parameter ............................................................................................................... 3-75
3.3.1 Factory Defaults............................................................................................................................................ 3-75
3.3.2 S-Parameter Definitions ............................................................................................................................... 3-75
S0 - Number of Rings to Automatic Answer ........................................................................................3-75
S1 - Ring Counter................................................................................................................................. 3-75
S2 - Escape Character .......................................................................................................................... 3-76
S3 - Line Termination Character........................................................................................................... 3-76
S4 - Response Formatting Character ................................................................................................... 3-76
S5 - Command Line Editing Character ................................................................................................. 3-76
S6 - Wait Time for Dial Tone Before Blind Dialing, or After “W” Dial Modifier..................................... 3-77
S7 - Wait Time For Carrier After Dial, For Silence, or For Dial Tone After “W” Dial Modifier ............... 3-77
S8 - Pause Time For Dial Delay ............................................................................................................ 3-77
S10 - Lost Carrier To Hang Up Delay ................................................................................................... 3-78
S11 - DTMF Tone Duration................................................................................................................... 3-78
S12 - Escape Prompt Delay (EPD) ....................................................................................................... 3-78
S18 - Test Timer................................................................................................................................... 3-78
S28 - Select Pulse Dial/Make/Break Ratio ............................................................................................ 3-79
S29 - Flash Dial Modifier Time ............................................................................................................. 3-79
S30 - Disconnect Inactivity Timer ........................................................................................................ 3-79
S46 - Data Compression Control.......................................................................................................... 3-79
S95 - Extended Result Codes Control .................................................................................................. 3-80
S210 - Maximum Symbol Rate ............................................................................................................ 3-80
3.4 Result Codes................................................................................................................................................................. 3-81
4 Fax Class 1 and Fax Class 1.0 Commands............................................................................................4-1
4.1 Fax I/O Processing.......................................................................................................................................................... 4-1
4.1.1 DTE-to-Modem Transmit Data Stream ........................................................................................................... 4-1
4.1.2 Modem-to-DTE Receive Data Stream............................................................................................................. 4-1
4.1.3 Fax Mode Selection ........................................................................................................................................ 4-1
4.1.4 Fax Origination ............................................................................................................................................... 4-3
4.1.5 Fax Answering ................................................................................................................................................ 4-3
4.1.6 Fax Control Transmission............................................................................................................................... 4-3
4.1.7 Fax Control Reception .................................................................................................................................... 4-3
4.1.8 Fax Data Transmission ................................................................................................................................... 4-4
4.1.9 Fax Data Reception......................................................................................................................................... 4-5
4.2 Commands and Parameters ........................................................................................................................................... 4-6
4.2.1 Mode Entry Commands.................................................................................................................................. 4-6
+FCLASS=1 - Select Facsimile Class 1 Mode ......................................................................................... 4-6
+FCLASS=1.0 - Select Facsimile Class 1.0 Mode...................................................................................4-6
4.2.2 Mode Commands ........................................................................................................................................... 4-6
+FAE - Auto Answer Enable .................................................................................................................... 4-6
+FTS - Transmit Silence ......................................................................................................................... 4-7
+FRS - Receive Silence........................................................................................................................... 4-8
+FTM - Transmit Facsimile ..................................................................................................................... 4-9
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+FRM - Receive Facsimile .................................................................................................................... 4-10
+FTH - Transmit Data with HDLC Framing ........................................................................................... 4-11
+FRH - Receive Data with HDLC Framing............................................................................................. 4-12
4.2.3 Service Class 1 Parameters.......................................................................................................................... 4-13
+FAR - Adaptive Reception Control ...................................................................................................... 4-13
+FCL - Carrier Loss Timeout ................................................................................................................ 4-14
+FDD - Double Escape Character Replacement.................................................................................... 4-15
+FIT - DTE Inactivity Timeout ............................................................................................................... 4-16
+FPR - Fixed DTE Rate ......................................................................................................................... 4-17
+FMI - Request Manufacturer Identification......................................................................................... 4-18
+FMM - Request Model Identification .................................................................................................. 4-18
+FMR - Request Revision Identification ............................................................................................... 4-18
+FLO - Flow Control.............................................................................................................................. 4-19
4.3 Examples ...................................................................................................................................................................... 4-19
5 Voice Commands .................................................................................................................................5-1
5.1 Voice Commands Overview ............................................................................................................................................ 5-1
5.1.1 <DLE> Shielded Event Codes Sent to the DTE ............................................................................................... 5-2
5.1.2 <DLE> Shielded Codes Sent to the Modem (DCE) ......................................................................................... 5-3
5.2 Voice Commands............................................................................................................................................................ 5-4
5.2.1 Configuration Commands............................................................................................................................... 5-4
+FCLASS=8 - Select Voice Mode............................................................................................................ 5-4
+VNH - Automatic Hang-up Control ....................................................................................................... 5-4
5.2.2 Voice Commands ........................................................................................................................................... 5-5
+VIP - Voice Initialize All Parameters ..................................................................................................... 5-5
+VRX - Start Modem Receive (Record).................................................................................................. 5-5
+VTR - Start Voice Transmission and Reception (Voice Duplex)........................................................... 5-6
+VTS - Send Voice Tone(s) .................................................................................................................... 5-7
+VTX - Start Modem Transmit (Playback).............................................................................................. 5-9
+VGR - Voice Gain Receive (Record Gain) ............................................................................................. 5-9
+VGT - Voice Gain Transmit (Playback Volume) .................................................................................. 5-10
+VIT - Voice Inactivity Timer (DTE/Modem)......................................................................................... 5-11
+VLS - Analog Source/Destination Selection ....................................................................................... 5-12
+VRA - Ringback Goes Away Timer ..................................................................................................... 5-13
+VRN - Ringback Never Appeared Timer ............................................................................................. 5-14
+VSD - Silence Detection (Quiet and Silence) ...................................................................................... 5-15
+VSM - Compression Method Selection .............................................................................................. 5-16
+VTD - Beep Tone Duration Timer........................................................................................................ 5-17
+VDR - Distinctive Ring........................................................................................................................ 5-18
+VDT - Control Tone Cadence Reporting ............................................................................................. 5-19
+VBT - Buffer Threshold Setting........................................................................................................... 5-20
+VPR - Select DTE/Modem Interface Rate (Turn Off Autobaud) .......................................................... 5-21
5.2.3 Speakerphone Commands ........................................................................................................................... 5-22
+VSP - Speakerphone ON/OFF ............................................................................................................. 5-22
+VDX - Speakerphone Duplex Mode .................................................................................................... 5-23
+VGM - Microphone Gain..................................................................................................................... 5-24
+VGS - Speaker Gain ............................................................................................................................ 5-25
100498E Conexant vii
Tables
Table 3-1. Result Codes.................................................................................................................................................... 3-15
Table 3-2. +MS Command Supported Rates .................................................................................................................... 3-33
Table 3-3. V.8/V.8bis Example Commands/Responses for Originator and Answerer ...................................................... 3-51
Table 3-4. AT#UD Last Call Status Report Format............................................................................................................ 3-57
Table 3-5. Call Setup Result Codes................................................................................................................................... 3-58
Table 3-6. Multimedia Modes ........................................................................................................................................... 3-58
Table 3-7. DTE-DCE modes .............................................................................................................................................. 3-58
Table 3-8. V.34 INFO bit report ......................................................................................................................................... 3-58
Table 3-9. gstnModulationSchemeActive from 3.7.2/V.58 ............................................................................................... 3-59
Table 3-10. errorControl Active from 3.5.2/V.58 .............................................................................................................. 3-59
Table 3-11. compressionActive from 3.2.2/V.58 .............................................................................................................. 3-59
Table 3-12. callCleared codes from 3.6.4/V.58-1994 ....................................................................................................... 3-60
Table 3-13. Completed Data Call, with Some Errors and Rate Retrain during the Call ..................................................... 3-61
Table 3-14. S-Parameter Summary .................................................................................................................................. 3-74
Table 3-15. Result Code Definitions ................................................................................................................................. 3-82
Table 4-1. Fax Class 1 and Fax Class 1.0 Commands......................................................................................................... 4-2
Table 4-2. Fax Class 1 and Fax Class 1.0 Modulation Modes and Rates ............................................................................ 4-9
Table 4-3. Inactivity Timer Start and Stop Events............................................................................................................. 4-16
Table 4-4. Fax Class 1 Calling Sequence (Transmitting a Single Page)............................................................................ 4-20
Table 4-5. Fax Class 1 Answering Sequence (Receiving a Single Page)........................................................................... 4-21
Table 5-1. Voice Commands ............................................................................................................................................... 5-1
Table 5-2. Supported <DLE> Shielded Codes Sent to the DTE ........................................................................................... 5-2
Table 5-3. Supported <DLE> Shielded Codes Sent to the Modem (DCE) ........................................................................... 5-3
Table 5-4. +VLS Command Options ................................................................................................................................. 5-12
Commands for Host-Processed Modems Reference Manual
viii Conexant 100498E
Commands for Host-Processed Modems Reference Manual
1 Introduction
1.1 Overview
This manual describes the commands and responses for Conexant host-processed (HSF or
SoftK56) modem families.
The commands and responses described herein are implemented in HSF drivers V6.02.00 and
subsequent.
Additional configuration and implementation information is available in release notes and/or
readme files that accompany product software release. The .INF File contains exact
application unique information and default values.
1.1.1 Command Syntax
The fundamental DTE interface command syntax is described in Section 2.
1.1.2 Command Descriptions
These commands are grouped into the following categories:
Syntax and procedures Section 2
Data commands Section 3
Fax Class 1 and Fax Class 1.0 commands Section 4
Voice/Audio commands Section 5
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1-2 Conexant 100498E
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2 Syntax and Procedures
The command and response syntax and procedures generally conform to referenced
recommendations and standards. Since these recommendations and standards describe
characteristics universal to a large installed base of modems to a maximum degree, there may
be syntax and procedural differences due to extensions and behavioral differences in
implemented commands, parameters, and responses beyond that described in these
recommendations and standards.
The syntax and procedures described in this section are based on V.250 and V.253 with
additional information included for implemented extensions, behavioral differences beyond
V.250, and legacy commands.
2.1 Alphabet
The T.50 International Alphabet 5 (IA5) is used in this document. Only the low-order seven
bits of each character are significant to the modem; any eighth or higher-order bit(s), if
present, are ignored for the purpose of identifying commands and parameters. Lower-case
characters are considered identical to their upper-case equivalents when received by the
modem from the DTE. Result codes from the modem are in upper case.
2.2 DTE Commands Lines
Words enclosed in <angle brackets> are references to syntactical elements. The brackets are
not used when the words appear in a command line. Words enclosed in [square brackets]
represent optional items which may be omitted from the command line at the specified point.
The square brackets are not used when the words appear in the command line. Other
characters that appear in syntax descriptions must as included as shown.
Any modem responses are mentioned in terms of their alphabetic format; the actual response
issued will depend on the setting of parameters that affect response formats, e.g., Q and V
commands (see 2.7).
2.2.1 Command Line General Format
A command line is made up of three elements: the prefix, the body, and the termination
character.
The command line prefix consists of the characters "AT" or "at" or, to repeat the execution of
the previous command line, the characters "A/" or "a/".
The body is made up of individual commands described in this document. Space characters
(IA5 2/0) are ignored and may be used freely for formatting purposes, unless they are
embedded in numeric or string constants. The termination character may not appear in the
body. The modem can accept at least 80 characters in the body.
The termination character may be selected by a user option (parameter S3), the default being
CR.
100498E Conexant 2-1
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2.2.2 Command Line Editing
The character defined by parameter S5 (default, BS) is interpreted as a request from the DTE
to the modem to delete the previous character. Any control characters (IA5 0/0 through 1/15,
inclusive) that remain in the command line after receipt of the termination character are
ignored by the modem.
The modem checks characters from the DTE first to see if they match the termination
character (S3), then the editing character (S5), before checking for other characters. This
ensures that these characters will be properly recognized even if they are set to values that the
modem uses for other purposes. If S3 and S5 are set to the same value, a matching character
will be treated as matching S3 (S3 is checked before S5).
2.2.3 Command Line Echo
The modem may echo characters received from the DTE during command state and online
command state back to the DTE, depending on the setting of the E command. If enabled,
characters received from the DTE are echoed in the same format as received. Invalid
characters in the command line or incomplete or improperly-formed command line prefixes
may not be echoed.
2.2.4 Repeating a Command Line
If the prefix "A/" or "a/" is received, the modem immediately executes once again the body of
the preceding command line. No editing is possible, and no termination character is
necessary. A command line may be repeated multiple times in this manner. Responses to the
repeated command line are issued using format of the original command line. If "A/" is
received before any command line has been executed, the preceding command line is
assumed to have been empty (that results in an OK result code).
2.2.5 Types of DTE Commands
There are two types of commands: action commands and parameter commands. Commands of
either type may be included in command lines, in any order.
Action commands may be "executed" (to invoke a particular function of the equipment, which
generally involves more than the simple storage of a value for later use), or "tested" (to
determine whether or not the equipment implements the action command, and, if
subparameters are associated with the action, the ranges of subparameter values that are
supported).
Parameters may be "set" (to store a value or values for later use), "read" (to determine the
current value or values stored), or "tested" (to determine whether or not the equipment
implements the parameter, and the ranges of values supported).
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2.3 Basic Syntax Commands
2.3.1 Basic Syntax Command Format
The format of Basic Syntax commands, except for the D and S commands, is as follows:
<command>[<number>]
where <command> is either a single character, or the "&" character followed by a single
character per V.250. In addition, <command> can be the "%" character followed by a single
character, the "*" character followed by a single character, or the "^" character followed by a
single character.
<number> may be a string of one or more characters from "0" through "9" representing a
decimal integer value. Commands that expect a <number> are noted in the description of the
command. If a command expects <number> and it is missing (<command> is immediately
followed in the command line by another <command> or the termination character), the value
"0" is assumed. If a command does not expect a <number> and a number is present, an
ERROR is generated. All leading "0"s in <number> are ignored by the modem.
Additional commands may follow a command (and associated parameter, if any) on the same
command line without any character required for separation. The actions of some commands
cause the remainder of the command line to be ignored (e.g., A).
See the D command for details on the format of the information that follows it.
2.3.2 S-Parameters
Commands that begin with the letter "S" are known as "S-parameters". The number following
the "S" indicates the "parameter number" being referenced. If the number is not recognized as
a valid parameter number, an ERROR result code is issued.
Immediately following this number, either a "?" or "=" character must appear. "?" is used to
read the current value of the indicated S-parameter; "=" is used to set the S-parameter to a
new value.
S<parameter_number>?
S<parameter_number>=[<value>]
If the "=" is used, the new value to be stored in the S-parameter is specified in decimal
following the "=". If no value is given (i.e., the end of the command line occurs or the next
command follows immediately), the S-parameter specified may be set to 0, or an ERROR
result code issued and the stored value left unchanged. The ranges of acceptable values are
given in the description of each S-parameter.
If the "?" is used, the modem transmits a single line of information text to the DTE. The text
portion of this information text consists of exactly three characters, giving the value of the Sparameter in decimal, with leading zeroes included.
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2.4 Extended Syntax Commands
2.4.1 Command Naming Rules
Both actions and parameters have names, which are used in the related commands. Names
always begin with the character "+". Following the "+", from one to 16 additional characters
appear in the command name. These characters will be selected from the following set:
A through Z (IA5 4/1 through 5/10)
0 through 9 (IA5 3/0 through 3/9)
! (IA5 2/1)
% (IA5 2/5)
- (IA5 2/13)
. (IA5 2/14)
/ (IA5 2/15)
: (IA5 3/10)
_ (IA5 5/15)
The first character following the "+" must be an alphabetic character in the range of "A"
through "Z". This first character generally implies the application in which a command is used
(e.g., F for Fax or V for voice).
2.4.2 Values
The modem considers lower-case characters to be the same as their upper-case equivalents.
When subparameters are associated with the execution of an action, or when setting a
parameter, the command may include specification of values. This is indicated by the
appearance of <value> in the descriptions below.
<value> consists of either a numeric constant or a string constant.
Numeric Constants
Numeric constants are expressed in decimal, hexadecimal, or binary.
Decimal numeric constants consist of a sequence of one or more of the characters "0" through
"9", inclusive.
Hexadecimal numeric constants consist of a sequence of one or more of the characters "0"
through "9", inclusive, and "A" through "F" inclusive. The characters "A" through "F"
represent the equivalent decimal values 10 through 15.
Binary numeric constants consist of a sequence of one or more of the characters "0" and "1".
In all numeric constants, the most significant digit is specified first. Leading "0" characters
are ignored by the modem. No spaces, hyphens, periods, commas, parentheses, or other
generally-accepted numeric formatting characters are permitted in numeric constants; note in
particular that no "H" suffix is appended to the end of hexadecimal constants.
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String Constants
String constants consist of a sequence of displayable IA5 characters, each in the range from
2/0 to 7/15, inclusive, except for the characters ‘"’ (IA5 2/2) and "\" (IA5 5/12). String
constants are bounded at the beginning and end by the double-quote character (‘"’, IA5 2/2).
Any character value may be included in the string by representing it as a backslash ("\")
character followed by two hexadecimal digits. For example, "\0D" is a string consisting of the
single character <CR> (IA5 0/13). If the "\" character itself is to be represented in a string, it
is encoded as "\5C". The double-quote character, used as the beginning and ending string
delimiter, is represented within a string constant as "\22".
A "null" string constant, or a string constant of zero length, is represented by two adjacent
delimiters ("").
Compound Values
Actions may have more than one subparameter associated with them, and parameters may
have more than one value. These are known as "compound values", and their treatment is the
same in both actions and parameters.
A compound value consists of any combination of numeric and string values (as defined in
the description of the action or parameter). The comma character must be included as a
separator, before the second and all subsequent values in the compound value. If a value is not
specified (i.e., defaults assumed), the required comma separator must be specified; however,
trailing comma characters may be omitted if all associated values are also omitted.
2.4.3 Action Commands
Action Execution Command Syntax
There are two general types of action commands: those that have associated subparameter
values that affect only that invocation of the command, and those that have no subparameters.
If subparameters are associated with a command, the definition of the action command
indicates, for each subparameter, whether the specification of a value for that subparameter is
mandatory or optional. For optional subparameters, the definition indicates the assumed
(default) value for the subparameter if no value is specified for that subparameter; the
assumed value may be either a previous value (i.e., the value of an omitted subparameter
remains the same as the previous invocation of the same command, or is determined by a
separate parameter or other mechanism), or a fixed value (e.g., the value of an omitted
subparameter is assumed to be zero). Generally, the default value for numeric subparameters
is 0, and the default value for string subparameters is "" (empty string).
The following syntax is used for actions that have no subparameters:
+<name>
The following syntax is used for actions that have one subparameter:
+<name>[=<value>]
The following syntax is used for actions that have two or more subparameters:
+<name>[=<compound_value>]
For actions that accept subparameters, if all subparameters are defined as being optional, and
the default values for all subparameters are satisfactory, the data terminal equipment (DTE)
may use the first syntax above (i.e., omit the "=" from the action execution command as well
as all of the subparameter value string).
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If all other relevant criteria are met (e.g., the modem is in the proper state), the command is
executed with any indicated subparameters. If <name> is not recognized, the modem issues
the ERROR result code and terminates processing of the command line. An ERROR is also
generated if a subparameter is specified for an action that does not accept subparameters, if
too many subparameters are specified, if a mandatory subparameter is not specified, if a value
is specified of the wrong type, or if a value is specified that is not within the supported range.
Action Test Command Syntax
The DTE may test if an action command is implemented in the modem by using the syntax:
+<name>=?
If the modem does not recognize the indicated name, it returns an ERROR result code and
terminates processing of the command line. If the modem does recognize the action name, it
returns an OK result code. If the named action accepts one or more subparameters, the modem
sends an information text response to the DTE, prior to the OK result code, specifying the
values supported by the modem for each such subparameter, and possibly additional
information. The format of this information text is defined for each action command.
2.4.4 Parameter Commands
Parameter Types
Parameters may be defined as "read-only" or "read-write". "Read-only" parameters are used to
provide status or identifying information to the DTE, but cannot be set by the DTE;
attempting to set their value is an error. In some cases (specified in the description of the
individual parameter), the modem may ignore attempts to set the value of such parameters
rather than respond with an ERROR result code, if the continued correct operation of the
interface between the modem and DTE will not be affected by such action. Read-only
parameters may be read and tested.
"Read-write" parameters may be set by the DTE, to store a value or values for later use. Readwrite parameters may be set, read, and tested.
Parameters may take either a single value, or multiple (compound) values. Each value may be
either numeric or string; the definition of the parameter will specify the type of value for each
subparameter. Attempting to store a string value in a numeric parameter, or a numeric value in
a string parameter, is an error.
Parameter Set Command Syntax
The definition of the parameter indicates, for each value, whether the specification of that
value is mandatory or optional. For optional values, the definition indicates the assumed
(default) value if none is specified; the assumed value may be either a previous value (i.e., the
value of an omitted subparameter retains its previous value), or a fixed value (e.g., the value
of an omitted subparameter is assumed to be zero). Generally, the default value for numeric
parameters is 0, and the default value for string parameters is "" (empty string).
The following syntax is used for parameters that accept a single value:
+<name>=[<value>]
The following syntax is used for parameters that accept more than one value:
+<name>=[<compound_value>]
For each implemented parameter, if all mandatory values are specified, and all values are
valid according to the definition of the parameter, the specified values are stored. If <name>
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is not recognized, one or more mandatory values are omitted, or one or more values are of the
wrong type or outside the permitted range, the modem issues the ERROR result code and
terminates processing of the command line. An ERROR is also generated if too many values
are specified. In case of an error, all previous values of the parameter are unaffected.
Parameter Read Command Syntax
The DTE may determine the current value or values stored in a parameter by using the
following syntax:
+<name>?
The modem responds by sending the current values stored for the parameter to the DTE in an
information text response. The format of this response is described in the definition of the
parameter. Generally, the values are sent in the same form in which they would be issued by
the DTE in a parameter setting command; if multiple values are supported, they will generally
be separated by commas, as in a parameter setting command.
Parameter Test Command Syntax
The DTE may test if a parameter is implemented in the modem, and determine the supported
values, by using the syntax:
+<name>=?
If the modem does not recognize the indicated name, it returns an ERROR result code and
terminates processing of the command line. If the modem does recognize the parameter name,
it returns an information text response to the DTE, followed by an OK result code. The
information text response indicates the values supported by the modem for each such
subparameter, and possibly additional information. The format of this information text is
defined for each parameter.
2.4.5 Additional Syntax Rules
Concatenating Commands after Extended Syntax Commands
Additional commands may follow an extended-syntax command on the same command line if
a semicolon (";") is inserted after the preceding extended command as a separator. The
semicolon is not necessary when the extended syntax command is the last command on the
command line.
Concatenating Commands after Basic Format Commands
Extended syntax commands may appear on the same command line after a basic syntax
command without a separator, in the same manner as concatenation of basic syntax
commands.
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2.5 Issuing Commands
All characters in a command line must be issued at the same data rate, and with the
same parity and format.
The modem will ignore any command line that is not properly terminated. The modem may
consider 30 seconds of mark idle time between any two characters as an improperly
terminated command line. In this case the modem may or may not generate an ERROR
message. The modem will ignore any characters received from the DTE that are not part of a
properly-formatted command line.
If the maximum number of characters that the modem can accept in the body is exceeded, an
ERROR result code is generated after the command line is terminated.
The DTE will not begin issuing a subsequent command line until at least one-tenth of a
second has elapsed after receipt of the entire result code issued by the modem in response to
the preceding command line.
2.6 Executing Commands
Upon receipt of the termination character, the modem commences execution of the commands
in the command line in the order received from the DTE. Should execution of a command
result in an error, or a character be not recognized as a valid command, execution is
terminated, the remainder of the command line is ignored, and the ERROR result code is
issued. Otherwise, if all commands execute correctly, only the result code associated with the
last command is issued; result codes for preceding commands are suppressed. If no
commands appear in the command line, the OK result code is issued.
2.6.1 Aborting Commands
Some action commands that require time to execute may be aborted while in progress; these
are explicitly noted in the description of the command. Aborting of commands is
accomplished by the transmission from the DTE to the modem of any character. A single
character is sufficient to abort the command in progress; however, characters transmitted
during the first 125 milliseconds after transmission of the termination character are ignored
(to allow for the DTE to append additional control characters such as line feed after the
command line termination character). To ensure that the aborting character is recognized
by the modem, it should be sent at the same rate as the preceding command line; the
modem may ignore characters sent at other rates. When such an aborting event is
recognized by the modem, the modem terminates the command in progress and returns an
appropriate result code to the DTE, as specified for the particular command.
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2.6.2 Handling of Invalid Numbers and S-Parameter Values
The modem reacts to undefined numbers and S-parameter values in one of three ways:
1. Issue the ERROR result code, and leave the previous value of the parameter unchanged;
2. Issue the OK result code, and leave the previous value of the parameter unchanged; or,
3. Issue the OK result code, and set the parameter value to the valid value nearest to that
specified in the command line.
The description of each command specifies which of these three techniques is used to handle
invalid parameter values for that command or parameter.
2.7 Modem Responses
While in command state and online command state, the modem will issue responses using the
same rate, word length, and parity as the most recently received DTE command line. In the
event that no DTE command has yet been received, rate, word length, and parity used will
depend on the capabilities of the modem.
When the modem transitions from the command state or online command state to the online
data state, the result code CONNECT should be issued at the bit rate and parity used during
the command state. When the modem transitions from the online data state to the command
state or online command state, the result codes should be issued at the bit rate used during the
online data state. Thereafter, any unsolicited result codes should use the bit rate and parity of
the last command line issued by the DTE to the modem.
The characters of a response will be contiguous, with no more than 100 milliseconds of mark
idle issued between characters in addition to stop elements.
2.7.1 Responses
There are two types of responses that may be issued by the modem: information text and
result codes.
Information Text. Information text responses consist of three parts: a header, information
text, and a trailer:
1. The characters transmitted for the header are determined by the V command.
2. The trailer consists of two characters, being the character having the ordinal value of
3. Information text usually consists of a single line; information text returned in response to
Result Code Parts. Result codes consist of three parts: a header, the result text, and a trailer.
1. The characters transmitted for the header and trailer are determined by the V command
2. The result text may be transmitted as a number or as a string, also depending on a the V
parameter S3 followed by the character having the ordinal value of parameter S4.
some commands may contain multiple lines, and the text may therefore include CR, LF,
and other formatting characters to improve readability.
setting.
command setting.
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Result Code Types. There are three types of result codes: final, intermediate, and unsolicited.
Result codes are described in Section 3.4.
1. A final result code indicates the completion of a full modem action and an ability to
accept new commands from the DTE.
2. An intermediate result code is a report of the progress of an modem action. The
CONNECT result code is an intermediate result code. In the case of a dialing or
answering command, the modem switches from command state to online data state, and
issues a CONNECT result code. This is an intermediate result code for the modem
because it cannot accept commands from the DTE while in online data state. When the
modem switches back to the command state it then issues a final result code (such as OK
or NO CARRIER).
3. Unsolicited result codes (such as RING) indicate the occurrence of an event not directly
associated with the issuance of a command from the DTE.
2.7.2 Extended Syntax Result Codes
Extended syntax result codes may be issued in response to either basic or extended
commands, or both. The appropriate responses are specified in the definitions of the
commands, the responses, or both.
The general format of extended syntax result codes is the same as result codes defined in TIA602 with regard to headers and trailers. The characters specified in S-parameters S3 and S4
are used in headers and trailers of extended syntax result codes as they are in basic format
result codes. The setting of the V command affects the headers and trailers associated with
extended syntax result codes in the same manner as basic format result codes; however, unlike
basic format result codes, extended syntax result codes have no numeric equivalent, and are
always issued in alphabetic form.
Extended syntax result codes are subject to suppression by the Q1 command, as with basic
format result codes. The issuance of extended syntax result codes are not be affected by the
setting of the X command.
Extended syntax result codes may be either final, intermediate, or unsolicited; the type being
indicated in the definition of the result code.
Extended syntax result codes are prefixed by the "+" character to avoid duplication of basic
format result codes specified in TIA-602. Following the "+" character, the name of the result
code appears; result code names follow the same rules as command names.
Extended syntax result codes may include the reporting of values. The definition of the result
code specifies whether or not values are appended to the result code, and, if so, how many,
their types, and their assumed default values if omitted.
Data/voice Modes. When no values are to be reported, the result code appears in the simplest
form:
+<name>
If a single value is to be reported, the form of the result code is:
+<name>: <value>
A single space character separates the colon character from the <value>; no space appears
between the result code name and the colon. If multiple values are to be reported with the
result code, the form is:
+<name>: <compound_value>
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Fax Modes. If a single value is to be reported, the form of the result code is:
<value> or (<value>)
2.7.3 +<name>: <compound_value>Information Text Formats for Test Commands
In general, the format of information text returned by extended syntax commands is described
in the definition of the command.
The modem may insert intermediate <CR> characters in very long information text responses
in order to avoid overrunning DTE receive buffers. If intermediate <CR> characters are
included, the modem does not include the character sequences "0 <CR>"or "OK<CR>", so
that DTE can avoid false detection of the end of these information text responses.
Range of Values
When the action accepts a single numeric subparameter, or the parameter accepts only one
numeric value, the set of supported values may be presented in the information text as an
ordered list of values. The list is preceded by a left parenthesis (() , and is followed by a right
parenthesis ()). If only a single value is supported, it appears between the parentheses. If more
than one value is supported, then the values may be listed individually, separated by comma
characters, or, when a continuous range of values is supported, by the first value in the range,
followed by a hyphen character (-), followed by the last value in the range. The specification
of single values and ranges of values may be intermixed within a single information text. In
all cases, the supported values are indicated in ascending order.
For example, the following are some examples of value range indications:
(0) Only the value 0 is supported.
(1,2,3) The values 1, 2, and 3 are supported.
(1-3) The values 1 through 3 are supported.
(0,4,5,6,9,11,12) The several listed values are supported.
(0,4-6,9,11-12) An alternative expression of the above list.
Compound Range of Values
When the action accepts more than one subparameter, or the parameter accepts more than one
value, the set of supported values is presented as a list of the parenthetically-enclosed value
range strings described above, separated by commas. For example, the information text in
response to testing an action that accepts three subparameters, and supports various ranges for
each of them, could appear as follows:
(0),(1-3),(0,4-6,9,11-12)
This indicates that the first subparameter accepts only the value 0, the second accepts any
value from 1 through 3 inclusive, and the third subparameter accepts any of the values 0, 4, 5,
6, 9, 11, or 12.
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3 Data Command Set
3.1 Command Guidelines
The commands used to control and report modem operation in data modem mode are defined
in this section.
The Data Modem Mode commands and responses described in this section are applicable
when command +FCLASS=0. (See +FCLASS in Section 3.2.1 for the definition of the
FCLASS command.)
The default values are typical of a fully configured modem supporting all data rates and
options. The actual default value is dependent upon modem software as defined by the .INF
File.
Commands are 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.
3.1.1 Escape Code Sequence
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.
3.2 Data Commands
The modem will respond to the commands detailed below. Parameters applicable to each
command are listed with the command description. The defaults shown correspond to default
values provided in the .INF File.
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3.2.1 Generic Modem Control
Z - Reset to Default Configuration
This command instructs the modem to reset to default values as altered by non-volatile
parameter storage. If the modem is connected to the line, it will be disconnected from the line,
terminating any call in progress.
All of the functions of the command are completed before the modem issues the result code.
The DTE should not include additional commands on the same command line after the Z
command because such commands are ignored.
Syntax
Z
Result Code
OK
+FCLASS - Select Active Service Class
This command selects the active service class (mode).
Syntax
+FCLASS=<mode>
Defined Values
<mode> Decimal number which corresponds to the selected service class.
0 Select Data Mode (see Section 3) (Default.)
1 Select Facsimile Class 1 Mode (see Section 4)
1.0 Select Facsimile Class 1.0 Mode (see Section 4)
8 Select Voice Mode (see Section 5)
Result Codes
OK For <mode> = 0, 1, 1.0, and 8, as supported by the .INF File.
ERROR Otherwise.
Reporting Current or Selected Values
Command: +FCLASS?
Response: +FCLASS: <mode>
Example: +FCLASS: 0 For the default setting.
Reporting Supported Range of Parameter Values
Command: +FCLASS=?
Response: +FCLASS: (<mode> range)
Example: +FCLASS: (0, 1,1.0,8)
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+VCID - Caller ID (CID)
This command controls the reporting and presentation of data associated with the Caller ID
services in the U.S. and Canada in the Incoming Call Line ID (ICLID) data format.
Syntax
+VCID=<pmode>
Defined Values
<pmode> Decimal number corresponding to the selected option.
0 Disable Caller ID reporting. (Default).
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.
2 Enables Caller ID with unformatted presentation to
the DTE.
Reporting Current or Selected Values
Command: +VCID?
Response: +VCID: <pmode>
Example: +VCID: 0 For the default setting.
Reporting Supported Range of Parameter Values
Command: +VCID=?
Response: +VCID: (<pmode> range)
Example: +VCID: (0,1,2)
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+VRID - Report Retrieved Caller ID (CID)
This command reports the data associated with the Caller ID services in the Incoming Call
Line ID (ICLID) data format for the last received call.
Syntax
+VRID=<pmode>
Defined Values
<pmode> Decimal number corresponding to the selected option.
0 Reports Caller ID with formatted presentation to the
DTE. The modem presents the data items in a
<Tag><Value> pair format. The expected pairs are
date, time, name, and caller code (telephone number),
1 Reports Caller ID with unformatted presentation to
the DTE.
Reporting Supported Range of Parameter Values
Command: +VRID=?
Response: +VRID: (<pmode> range)
Example: +VRID: (0,1)
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\N - Operating Mode
This command controls the preferred error correcting mode to be negotiated in a subsequent
data connection.
Syntax
\N<mode>
Defined Values
<mode> Decimal number which corresponds to the selected mode.
0 Selects normal speed buffered mode (disables error-
correction mode) and forces &Q6 (selects
asynchronous operation in normal mode.)
1 Same as \N0.
2 Selects reliable (error-correction) mode and forces
&Q5 (the modem will try to negotiate an error
corrected link). 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.
3 Selects auto reliable mode and forces &Q5 (the
modem will try to negotiate an error corrected link).
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.
4 Selects LAPM error-correction mode and forces &Q5
(the modem will try to negotiate an error corrected
link). Failure to make an LAPM error-correction
connection results in the modem hanging up.
5 Selects MNP error-correction mode and forces &Q5
(the modem will try to negotiate an error corrected
link). Failure to make an MNP error-correction
connection results in the modem hanging up.
Result Codes
OK <mode> = 0 to 5.
ERROR Otherwise.
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&F - Set to Factory-Defined Configuration
This command instructs the modem to set all parameters to factory default values defined in
the product Configuration Table
The modem loads the factory default configuration (profile). The factory defaults are
identified for each command and in the S-Parameter descriptions. A configuration (profile)
consists of a subset of S-Parameters.
Syntax
&F
Result Code
OK
&T - Local Analog Loopback Test
The modem will perform the local analog loopback test if &T1 is selected. The test can be run
only when in an asynchronous operation in non-error-correction mode (normal). To terminate
the test in progress, the escape sequence must be entered first (see Section 3.1.1). If S18 is
non-zero, the test will terminate automatically after the time specified by S18 and the OK
result code will be reported.
Syntax
&T[<value>]
Defined Values
<value> Decimal number corresponding to the selected value.
0 Terminates test in progress.
1 Initiates local analog loopback, V.54 Loop 3. 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.
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I - Request Identification Information
This command causes the modem to report one or more lines of product information text, as
selected by the <value> subparameter, followed by a final result code.
Syntax
I[<value>]
Defined Values
<value> Decimal number corresponding to the selected information.
0 Reports product code, e.g.:
ATI0
56000
OK
1 Reports the least significant byte of the stored
checksum in decimal (see firmware release notes).
Reports 255 if the prestored checksum value is FFh,
e.g.,
ATI1
255
OK
2 Reports OK, e.g.:
ATI2
OK
OK
3 Reports identification codes, e.g.:
ATI3
SoftK56V_B2.1_V7.04.05
OK
4 Reports product description from the .INF file (the
response is customizable by customizing the INF
file), e.g.:
ATI4
SoftK56 Data Fax
OK
5 Reports Country Code parameter (in decimal), e.g.:
ATI5
181
OK
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6 Reports modem data pump model and internal code
revision, e.g.:
ATI6
SoftK56
CModem Version 12
Rksample Version 342
OK
7 Reports 255 and OK, e.g.:
ATI7
255
OK
8 Reports build date and time, e.g.:
ATI8
Jan 7 2004 # 15:45:08
OK
9 Reports country, e.g.:
ATI9
USA
OK
Result Codes
OK <value> = 0-9.
ERROR Otherwise.
+GMI - Request Manufacturer Identification
This command causes the modem to report the modem product manufacturer as provided by
the .INF File.
Syntax
+GMI
Typical Response
+GMI: Conexant
OK
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