AT Commands for
RC288ACx and RC144ACx Modem Families
Reference Manual
(Preliminary)
Order No. 1048P
Rev. 3, January 31, 1996
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.
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.
ConfigurACE is a trademark of Rockwell International.
MNP is a registered
trademark of Microcom, Inc.
Hayes is a registered trademark of Hayes
Microcomputer Products, Inc.
PREFACE
This manual supersedes the following manuals:
1. AT Command Reference Manual for the RC288ACi and RC288ACL Modem Families (Order No. 1048, Rev.2, May 5, 1995).
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).
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.
1. In Section 1.1, the reference to RHSI was deleted.
2. In Section 3.2.1, Fn was added for RC144 support.
3. In Section 3.2.1, J and K were deleted from the Dn command.
4. In Section 3.2.1, the I3 definition was expanded in the In command.
5. In Section 3.2.1, the Y1 definition was corrected in the Yn command.
6. In Section 3.2.2, the &Tn definition was expanded.
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.
8. In Section 3.2.2, the &Tn default was changed to &T5.
9. In Section 3.2.4, the \Vn - Single Line Connect Message Enable command was added.
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.
11. In Section 3.2.5, the +H11 definition was added to +Hn command.
12. In Section 3.4.1, the )Mn command definition was deleted except for command response compatibility.
13. In Section 3.4.1, the *Hn command definition was deleted except for command response compatibility.
14. In Section 3.4.1, the -Kn default value was changed to -K0.
15. In Section 3.4.1, the -Qn command definition was deleted except for command response compatibility.
16. In Section 3.4.1, the -SEC command definition note was expanded.
17. In Section 3.4.1, the @Mn command definition was deleted except for command response compatibility.
18. In Section 3.7.3, the definition was revised and expanded.
19. In Section 4.2, S21 default value was changed to 52 (34h) (to reflect &D2 and &C1 selected).
20. In Section 4.2, S23 default value was changed to 62 (3Dh) (to reflect 38400 or higher DTE speed).
21. In Section 4.2, S27 default value was changed to 73 (to reflect B1, Bell mode). Bit 2 state 1 was deleted.
22. In Section 4.2, S28 bits 6-7 were changed to reserved.
23. In Section 4.2, S29 default value was changed to 70 (to reflect 700 ms).
24. In Section 4.2, \Vn was added to S31 and S31 default value was changed to 194 (C2h) (to reflect a constant).
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.
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.
27. In Section 4.2, S201 was deleted.
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.
29. In Section 7 introduction, silence deletion was deleted.
30. In Section 7.1.2, silence deletion was deleted.
31. In Section 7.1.3, silence deletion was deleted.
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.
33. In Section 7.2.3, Table 7-2, silence deletion was deleted from the <DLE>q description.
34. In Section 7.2.7, the volume ajustment during playback was revised.
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."
36. In Section 7.3.2, #TL command, the result code definition was modified and the note for #TL command applicability was added.
37. In Section 7.3.2, #VBT command, the phrase "via the D command" was deleted.
38. In Section 7.3.2, #VLS command, telephone emulation (#VLS=5) was added to the command options and to Table 7-5.
39. In Section 7.3.2, #VSD command, the #VSD=1 command definition was deleted except for command response compatibility.
40. In Section 7.3.2, #VSP command, description of operation with silence deletion was deleted.
41. In Section 7.3.2, #VSR command, the result code definition was revised to delete the operation with #VBS=16.
42. In Section 7.3.2, #VSS command, the default was changed.
43. In Section 7.6, Table 7-7, the #VSD=1 command description and reference to silence deletion under #VSS=1 command were deleted.
44. In Section 7.6, Table 7-8, the #VSD=1 command description was deleted.
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.
46. In Section 7.6, Table 7-10, the #VSS=2 command description and the #VRX command CONNECT descriptions were revised.
47. In Section 7.6, Table 7-11, the #VSS=2 command description was revised and the #VSD=1 command was deleted.
48. In Section 7.6, Table 7-12, the #VSS=2 command description was revised.
49. In Section 8, the command summary was changed to reflect revised commands.
Table of Contents
List of Tables
Table 3-1. Result Codes
Table 3-2. Remote Modem Configuration and Resulting Transmit Levels
Table 4-1. S-Register Summary
Table 5-1. Fax Class 1 Commands
Table 5-2. Fax Class 1 Calling Sequence (One Page)
Table 5-3. Fax Class 1 Answering Sequence (One Page)
Table 6-1. Fax Class 2 Commands
Table 6-2. T.30 Session Subparameter Codes
Table 6-3. T.30 Post Page Message Codes
Table 6-4. T.30 Post Page Response Messages
Table 6-5. Hang Up Status Codes
Table 6-6. Send Two Pages, 1-D, No Errors
Table 6-7. Receive Two Pages, 1-D Data, No Errors
Table 7-1. DTE Speeds
Table 7-2. Codes Sent to the DTE
Table 7-3. Shielded DTE Codes
Table 7-4. AT Voice Commands
Table 7-5. Device Types Supported by #VLS
Table 7-6. #VTD Tone Detection/Reporting Bit Settings
Table 7-7. Record a Greeting Message
Table 7-8. Playback a Greeting Message
Table 7-9. Answer Call/Play Greeting/Record Message
Table 7-10. Call/Record Message/Receive Fax
Table 7-11. Answer Call, Determine It's a Fax
Table 7-12. Adaptive Fax/Data/Voice; Determine Data
Table 7-13. Originate a Call, Send Answerer a Message
List of Figures
Figure 6-1. T.30 Session Parameter Relationships
This manual describes the AT commands for the following Rockwell modem families:
RC288ACi
RC288ACL
RCV288ACi/SP
RCV288ACF/SP and RCV288ACF
RCV288ACi/SVD
RCV288ACL/SVD
RC144ACi and RC144ATi
RC144ACL and RC144ATL
RC144ACG
RC144ACF and
RC144ATF
RC144ACFL and RC144ATFL
RCV144ACi/SP
RCV144ACF/SP and
RCV144ACF
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.
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.
The fundamental DTE interface command syntax is described in Section 2. These commands are grouped into the following categories:
AT commands Section 3
S-Registers Section 4
Fax Class 1 commands
Section 5
Fax Class 2 commands Section 6
Voice/Audio commands Section
7
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.
1.1.3 Call Progress and Blacklisting Parameters
The modem MCU firmware may be provided either in reconfigurable form or preconfigured form. Consult the specific firmware release notes for exact configuration information.Reconfigurable Form. 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.
Preconfigured Form. Specific MCU firmware configurations may be released that can be directly installed without requiring the use of ConfigurACE II.
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. Order No. DescriptionMD86 RC144ACi and RC144ACL Modem Data Sheet
MD108 RC144ACG Modem Data Sheet
MD95 RC144ATi and RC144ATL Modem Data Sheet
MD129 RC144ACF and RC144ATF Modem Data Sheet
MD130 RC144ACFL and RC144ATFL Modem Data Sheet
MD137 RCV144ACi/SP Modem Data Sheet
MD146 RC144ACF/SP and RC144ATF/SP Modem Data Sheet
MD127 RC288ACi and RC288ACL Modem Data Sheet
MD134 RC288ACi/SVD Integrated V.34 Data/V.17 Fax/Voice/SVD Modem Data Sheet
MD150 RC288ACF/SP and RC288ATF/SP Modem Data Sheet
MD161 RC288ACL/SVD Modem Data Sheet
876 RC144ACi and RC144ACL Modem Designer's Guide
897 RC144ATi and RC144ATL Modem Designer's Guide
1008 RC144ACG Modem Designer's Guide
1055 RC144ACF and RC144ATF Modem Designer's Guide
1046 RC144ACF/SP and RC144ATF Modem Designer's Guide
1027 RC288ACi and RC288ACL Modem Designer's Guide
1046 RC288ACF/SP, RC288ATF/SP, RC144ACF/SP, and RC144ATF/SP Modem Designer's Guide
1054 RC288ACi/SVD Modem Designer's Guide
1082 RC144ACF/ASVD and RCV288ACF/ASVD Modem Designer's Guide
1096 RC288ACL/SVD SP Modem Designer's Guide
893 ConfigurACE II User's Manual
2.1 DTE/DCE INTERCHANGE CIRCUITS
Communication between the DTE and modem is half duplex (i.e., only one entity 'talks' at a time).2.2 COMMAND SYNTAX AND GUIDELINES
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 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. 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. 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. 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. 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.3.1.1 AT Commands, DTE Adaption
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 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.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.
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).
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.
Most commands entered with parameters out of range will not be accepted and the ERROR response will be returned to the DTE.
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.
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. 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. 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.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.
AT= x - Write to Selected S-Register
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.Result Codes
AT? - Read Selected S-Register
This command reads and displays the selected S-Register. An S-Register can be selected by using the ATSn command.Result Codes:
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.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.
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.)
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.)B0 Selects CCITT operation at 300 or 1200 bps during Call Establishment and a subsequent connection. (Default for W-class models.)
B1 Selects BELL operation at 300 or 1200 bps during Call Establishment and a subsequent connection. (Default for US models.)
Result Codes:
OK n = 0 or 1.
This command is included for compatibility only, and has no effect other than returning a result code. The only valid parameter is 1.Result Codes:
OK n = 1.
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. NOTE: If the ATD command is issued before the S1 register has cleared, the modem will respond with the NO CARRIER result code.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.
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.)
Dial Modifiers. The valid dial string parameters are described below. Punctuation characters may be used for clarity, with parentheses, hyphen, and spaces being ignored.
0-9 DTMF digits 0 to 9.
* The 'star' digit (tone dialing only).
# The 'gate' digit (tone dialing only).
A-D DTMF digits A, B, C, and D. Some countries may prohibit sending of these digits during dialing.
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 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.
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.
R This command will be accepted, but not acted on.
S=n Dial the number stored in the directory (n = 0 to 3). (See &Z.)
! Flash: the modem will go on-hook for a time defined by the value of S29. Country requirements may limit the time imposed.
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.
@ 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.
& 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.
, Dial pause: the modem will pause for a time specified by S8 before dialing the digits following ",".
; 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.
^ Toggles calling tone enable/disable: applicable to current dial attempt only.
( ) Ignored: may be used to format the dial string.
- Ignored: may be used to format the dial string.
<space> Ignored: may be used to format the dial string.
<i> Invalid character: will be ignored.
> If enabled by country specific parameter, the modem will generate a grounding pulse on the EARTH relay output.
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.E0 Disables command echo.
E1 Enables command echo. (Default.)
Result Codes:
OK n = 0 or 1.
Fn - Select Line Modulation (RC144 Models Only)
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.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.
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.
F2 Not supported.
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.
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.
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.
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.
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.
This setting also allows connection at the Rockwell proprietary 7200 V.32 speed, e.g., with a RC9696/12 based modem.
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.
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.
This setting also allows connection at the Rockwell proprietary 12000 V.32 speed, e.g., with a RC9696/12 based modem.
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.
This command initiates a hang up sequence.This command may not be available for some countries due to PTT restrictions.
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.
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.
Result Codes:
OK n = 0 or 1.
The modem reports to the DTE the requested result according to the command parameter.I0 Reports product code. Example: 28800
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.
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".
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
Note: If RPI+ is supported, "ROCKWELL RPI (TM)" is appended.
I4 Reports OEM defined identifier string in either Hayes-compatible binary format (default) or ASCII format (selectable by ConfigurACE). Example: RC288ACi (ASCII)
I5 Reports Country Code parameter. Example: 022
I6 Reports modem data pump model and internal code revision. Example: RC288DPi Rev 05BA
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.
Result Codes:
OK n = 0 to 7.
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.L0 Low volume.
L1 Low volume. (Default.)
L2 Medium volume.
L3 High volume.
Result Codes:
OK n = 0 to 3.
This command selects when the speaker will be on or off. The parameter value, if valid, is written to S22 bits 2 and 3.M0 Speaker is always off.
M1 Speaker is on during call establishment, but off when receiving carrier. (Default.)
M2 Speaker is always on.
M3 Speaker is off when receiving carrier and during dialing, but on during answering.
Result Codes:
OK n = 0 to 3.
This command enables or disables automode detection. The parameter value, if valid, is written to S31 bit 1.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.
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.)
Result Codes:
OK n = 0 or 1.
ERROR Otherwise.
Notes:
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:
N1S37=10 updates the +MS command subparameters to reflect +MS=10,1,300,12000
N0S37=10 updates the +MS command subparameters to reflect +MS=10,0,12000,12000
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.
On - Return to On-Line Data Mode
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.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 (+++).
O1 Enters on-line data mode with a retrain before returning to on-line data mode.
Result Codes:
OK n = 0 or 1 and a connection exists.
ERROR Otherwise or if not connected.
This command forces pulse dialing until the next T dial modifier or T command is received. Sets S14 bit 5.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.)
This command may not be permitted in some countries.
Result Code:
Qn - Quiet Results Codes Control
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.Q0 Enables result codes to the DTE. (Default.)
Q1 Disables result codes to the DTE.
Result Codes:
OK n = 0 or 1.
The modem selects an S-Register, performs an S-Register read or write function, or reports the value of an S-Register.n Establishes S-Register n as the last register accessed.
n=v Sets S-Register n to the value v.
n? Reports the value of S-Register n.
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.
For example:
ATS7 establishes S7 as the last accessed register.
AT=40 sets the contents of the last register accessed to 40.
ATS=20 sets the contents of the last register accessed to 20.
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.
In some cases, writing to the S-Register will appear to be accepted but the value will not actually be written.
Due to country restrictions, some commands will be accepted, but the value may be limited and replaced by a maximum or minimum value.
Minimum, maximum, and default values for S-Registers may be altered with ConfigurACE.
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.This command may not be permitted in some countries. (See P.)
Result Code:
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.V0 Enables short-form (terse) result codes. Line feed is not issued before a short-form result code.
V1 Enables long-form (verbose) result codes. (Default.)
Result Codes:
OK n = 0 or 1.
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).W0 Upon connection, the modem reports only the DTE speed (e.g., CONNECT 19200). Subsequent responses are disabled. (Default.)
W1 Upon connection, the modem reports the line speed, the error correction protocol, and the DTE speed, respectively. Subsequent responses are disabled.
W2 Upon connection, the modem reports the DCE speed (e.g., CONNECT 14400). Subsequent responses are disabled.
Result Codes:
OK n = 0, 1, or 2.
This command selects which subset of the result messages will be used by the modem to inform the DTE of the results of commands.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.
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.
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.
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.
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.
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.
X4 Enables monitoring of busy tones; send all messages. The value 111b is written to S22 bits 6, 5, and 4, respectively. (Default.)
Result Codes:
OK n = 0 to 4.
Table 3-1. Result Codes
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).
This command enables/disables the generation and response to long space
disconnect. The parameter value, if valid, is written to S21 bit 7.Y0 Disables long space disconnect. (default.)
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.
Result Codes:
OK n = 0 or 1.
Zn - Soft Reset and Restore Profile
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.Z0 Soft reset and restore stored profile 0.
Z1 Soft reset and restore stored profile 1.
Result Codes:
OK n = 0 or 1.
The modem controls the RLSD output in accordance with the parameter supplied. The parameter value, if valid, is written to S21 bit 5.&C0 RLSD remains ON at all times.
&C1 RLSD follows the state of the carrier. (Default.)
Result Codes:
OK n = 0 or 1.
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.&D0 - DTR drop is interpreted according to the current &Qn setting as follows:
&Q0, &Q5, &Q6 DTR is ignored (assumed ON). Allows operation with DTEs which do not provide DTR.
&Q1, &Q4 DTR drop causes the modem to hang up. Auto-answer is not affected.
&Q2, &Q3 DTR drop causes the modem to hang up. Auto-answer is inhibited.
&D1 DTR drop is interpreted according to the current &Qn setting as follows:
&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.
&Q2, &Q3 DTR drop causes the modem to hang up. Auto-answer is inhibited.
&D2 DTR drop is interpreted according to the current &Qn setting as follows:
&Q0 through &Q6 DTR drop causes the modem to hang up. Auto-answer is inhibited. (Default.)
&D3 DTR drop is interpreted according to the current &Qn setting as follows:
&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.
&Q2, &Q3 DTR drop causes the modem to hang up. Auto-answer is inhibited.
If &Q5, &Q6, +FCLASS=1 or +FCLASS=2 is in effect, the action taken is the same as for &Q0.
&Fn - Restore Factory Configuration (Profile)
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.&F0 Restore factory configuration 0.
&F1 Restore factory configuration 1.
Result Codes:
OK
ERROR If the modem is connected.
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.&G0 Disables guard tone. (Default for US models.)
&G1 Disables guard tone.
&G2 Selects 1800 Hz guard tone. (Default for W-class models.)
This command may not be permitted in some countries.
Result Codes:
OK n = 0 to 2.
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.&J0 &J0 command. (Default.)
&J1 &J1 command.
Result Codes:
OK n = 0 or 1.
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.&K0 Disables flow control.
&K3 Enables RTS/CTS flow control. (Default for data modem modes.)
&K4 Enables XON/XOFF flow control.
&K5 Enables transparent XON/XOFF flow control.
&K6 Enables both RTS/CTS and XON/XOFF flow control. (Default for fax modem and voice modes.)
Result Codes:
OK n = 0, 3, 4, 5, or 6.
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.&L0 Requests dial-up operation. Dial-up operation continues.
Result Codes:
OK n = 0.
&Mn - Asynchronous/Synchronous Mode Selection
This command determines the DTR operating mode. The modem treats the &M command as a subset of the &Q command.&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).
&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.)
&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.)
&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.)
Result Codes:
OK n = 0 to 3.
&Pn - Select Pulse Dial Make/Break Ratio
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.&P0 Selects 39%-61% make/break ratio at 10 pulses per second. (Default.)
&P1 Selects 33%-67% make/break ratio at 10 pulses per second.
&P2 Selects 39%-61% make/break ratio at 20 pulses per second.
&P3 Selects 33%-67% make/break ratio at 20 pulses per second.
Result Codes:
OK n = 0 to 3.
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.)NOTE: 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.
&Q0 Selects direct asynchronous operation. The value 000b is written to S27 bits 3, 1, and 0, respectively. See &M0.
&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.)
&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.)
&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.)
&Q4 Selects AutoSync operation. The value 100b is written to S27 bits 3, 1, and 0, respectively.
AutoSync operation, when used in conjunction with the Hayes Synchronous Interface (HSI) capability in the DTE, provides synchronous communication capability from an asynchronous terminal.
Starting AutoSync. 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.
Stopping AutoSync. AutoSync operation is stopped upon loss 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).
&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.)
&Q6 Selects asynchronous operation in normal mode (speed buffering). The value 110b is written to S27 bits 3, 1, and 0, respectively.
Result Codes:
OK n = 0 to 6.
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.&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.
&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.)
Result Codes:
OK n = 0 or 1.
This command selects how the modem will control DSR. The parameter value, if valid, is written to S21 bit 6.&S0 DSR will remain ON at all times. (Default.)
&S1 DSR will become active after answer tone has been detected and inactive after the carrier has been lost.
Result Codes:
OK n = 0 or 1.
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.&T0 Terminates test in progress. Clears S16.
&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.
&T2 Returns ERROR.
&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.
&T4 Enables digital loopback acknowledgment for remote request, i.e., an RDL request from a remote modem is allowed. Sets S23 bit 0.
&T5 Disables digital loopback acknowledgment for remote request, i.e., an RDL request from a remote modem is denied. Clears S23 bit 0. (Default.)
&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.
&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.
&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.
&V - Display Current Configuration and Stored Profiles
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.Result Code:
OK
Example:
AT&V
ACTIVE PROFILE:
B0 E1 L1 M1 N1 QO T V1 W0 X4 Y0 &C0 &D0 &G2 &J0 &K3 &Q5 &R1 &S0 &T4 &X0 &Y0
S00:002 S01:000 S02:043 S03:013 S04:010 S05:008 S06:002 S07:030 S08:002 S09:006
S10:014 S11:255 S12:050 S18:000 S25:005 S26:001 S36:007 S37:000 S38:020 S46:138
S48:007 S95:000
STORED PROFILE 0:
B0 E1 L1 M1 N1 QO T V1 W0 X4 Y0 &C0 &D0 &G2 &J0 &K3 &Q5 &R1 &S0 &T4 &X0
S00:002 S02:043 S06:002 S07:030 S08:002 S09:006 S10:014 S11:095 S12:050 S18:000
S36:007 S37:000 S40:105 S41:003 S46:138 S95:000
STORED PROFILE 1:
B0 E1 L1 M1 N1 QO T V1 W0 X4 Y0 &C0 &D0 &G2 &J0 &K3 &Q5 &R1 &S0 &T4 &X0
S00:002 S02:043 S06:002 S07:030 S08:002 S09:006 S10:014 S11:095 S12:050 S18:000
S36:007 S37:000 S40:105 S41:003 S46:138 S95:000
TELEPHONE NUMBERS:
0 = 1 =
2 = 3 =
OK
&Wn - Store Current Configuration
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.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).
&W0 Store the current configuration as profile 0.
&W1 Store the current configuration as profile 1.
Result Codes:
OK n = 0 or 1.
&Xn - Select Synchronous Clock Source
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.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.
&X0 Selects internal timing. The modem generates the transmit clock signal and applies it to the TXCLK output at the serial interface.
&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.
&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.
Result Codes:
OK n = 0 to 2.
&Yn - Designate a Default Reset Profile
Selects which user profile will be used after a hard reset.&Y0 The modem will use profile 0.
&Y1 The modem will use profile 1.
Result Codes:
OK n = 0 to 1.
ERROR If n > 1, or if NVRAM is not installed or is not operational.
&Zn=x - Store Telephone Number
The modem can store up to four telephone numbers and each telephone number dial string can contain up to 34 digits.&Zn=x n = 0 to 3 and x = dial string. (Requires 256-byte NVRAM.)
Result Codes:
OK For n <= 3, and x <= 34 digits.
ERROR If n > 3, x > 35 digits, or if NVRAM is not installed or is not operational.
%En - Enable/Disable Line Quality Monitor and Auto-Retrain or Fallback/Fall Forward
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.If enabled, the modem attempts to retrain for a maximum of 30 seconds.
%E0 Disable line quality monitor and auto-retrain.
%E1 Enable line quality monitor and auto-retrain.
%E2 Enable line quality monitor and fallback/fall forward. (Default.)
Result Codes:
OK n = 0, 1, or 2.
ERROR Otherwise.
Fallback/Fall Forward. 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.
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.
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, not at the telephone line connector. For example, 009 = -9 dBm, 043 = -43 dBm, and so on.Result Codes:
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.Example:
AT%Q
015
Result Codes:
OK If connected.
ERROR If not connected, or connected in 300 bps, V.23, or fax modes.
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.The response is different in three separate states.
The first state is where the modem receives a break from the DTE when the modem is operating in data transfer mode:
\K0 Enter on-line command mode, no break sent to the remote modem.
\K1 Clear data buffers and send break to remote modem.
\K2 Same as 0.
\K3 Send break to remote modem immediately.
\K4 Same as 0.
\K5 Send break to remote modem in sequence with transmitted data. (Default.)
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:
\K0 Clear data buffers and send break to remote modem.
\K1 Clear data buffers and send break to remote modem. (Same as 0.)
\K2 Send break to remote modem immediately.
\K3 Send break to remote modem immediately. (Same as 2.)
\K4 Send break to remote modem in sequence with data.
\K5 Send break to remote modem in sequence with data. (Same as 4.) (Default.)
The third case is where a break is received from a remote modem during a non-error corrected connection:
\K0 Clears data buffers and sends break to the DTE.
\K1 Clears data buffers and sends break to the DTE. (Same as 0.)
\K2 Send a break immediately to DTE.
\K3 Send a break immediately to DTE. (Same as 2.)
\K4 Send a break in sequence with received data to DTE.
\K5 Send a break in sequence with received data to DTE. (Same as 4.) (Default.)
Result Codes:
OK n = 0 to 5.
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.\N0 Selects normal speed buffered mode (disables error-correction mode). (Forces &Q6.)
\N1 Serial interface selected - Selects direct mode and is equivalent to &M0, &Q0 mode of operation. (Forces &Q0.)
Parallel interface selected - Same as \N0.
\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.)
\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.)
\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.
\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.)
Result Codes:
OK n = 0 to 5.
\Vn - Single Line Connect Message Enable
The single line connect message format can be enabled or disabled by the \Vn command as follows:\V0 Connect messages are controlled by the command settings X, W, and S95.
\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.
When single line connect messages are enabled, there are no CARRIER, PROTOCOL, or COMPRESSION messages apart from the fields described below.
The single line connect message format is:
CONNECT <DTE Speed></Modulation></Protocol></Compression></Line Speed>
Where:
<DTE Speed = DTE speed, e.g., 57600.
Modulation = "V32" for V.32 or V.32bis modulations.
"VFC" for V.FC(TM)
modulations.
"V34" for V.34 modulations.
Note: Modulation is omitted for all other modulations.
Protocol = "NONE" for no protocol.
"ALT" for Microcom Network
Protocol.
"LAPM" for LAP-M protocol.
Compression = "CLASS5" for Microcom MNP5 compression.
"V42BIS" for V.42bis
compression.
Note: Compression is omitted if protocol is NONE.
Line Speed = Asymmetric rates are displayed as /rate:TX/rate:RX, e.g., /1200
TX/75 RX.
Symmetric rates are displayed as a single DCE rate, e.g., 14400.
+MS= <mod> [,[<automode>][,[<min_rate>][,[<max_rate>]]]]<CR>
Notes:
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.)
2. Subparameters not entered (enter a comma only or <CR> to skip the last subparameter) remain at their current values.
+MS?
The response is:
+MS: <mod>,<automode>,<min_rate>,<max_rate>
For example,
+MS: 11,1,300,28800 (shows default values) [RC288]
+MS: 10,1,300,14400 (shows default values) [RC144]
+MS=?
The response is:
+MS: (list of supported <mod> values), (list of supported
<automode> values) (list of supported <min_rate> values),
(list
of supported <max_rate> values)
For example,
+MS: (0, 1, 2, 3, 9, 10, 11, 64, 69, 74), (0,1) (300-28800), (300-28800) [RC288]
+MS: (0, 1, 2, 3, 9, 10, 64, 69), (0,1) (300-14400), (300-14400) [RC144]
<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.
The modem may also automatically switch to another modulation (automode),
subject to the following constraints: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.
b. The DTE may disable automode operation (see <automode> below).
c. The DTE may constrain the range of modulations available by specifying the lowest and highest rates (see <min_rate> and <max_rate> below).
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:
<automode> Option Selected Notes
0 Automode disabled
1 Automode enabled using V.8 or V.32 Annex A Default
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).
For <automode> = 0 (automode disabled, i.e., fixed modulation):
a. If <max_rate> is within the rates supported by the selected modulation, the selected rate is that specified by <max_rate>. For example:
+MS=10,0,1200,4800 selects V.32 bis 4800 bps fixed rate.
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:
+MS=10,0,2400,14400 selects V.32 bis 14400, 12000, 9600, 7200, or 4800 bps.
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:
+MS=11,0,16800,16800 selects V.34 16800 bps fixed mode (no comparable S37 command).
+MS=10,0,12000,12000 selects V.32 bis 12000 bps fixed mode (same as N0S37=10).
For <automode> = 1 (automode enabled, i.e., automatically selected speed and modulation):
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.
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:
+MS=10,1,1200,24000 selects automoding down from V.32 bis 14400 bps.
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:
+MS=11,1,300,16800 selects automode starting at V.34 16800 bps (no comparable S37 command).
+MS=9,1,300,12000 selects automode starting at V.32 bis 12000 bps (same as N1S37=10).
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.
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.
+Hn - Enable/Disable RPI and DTE Speed
This command enables or disables Rockwell Protocol Interface (RPI) processing and sets the DTE speed. (Applicable only to modems supporting RPI and RPI+).+H0 Disable RPI/RPI+.
+H1 Enable RPI mode and set DTE speed to 19200 bps.
+H2 Enable RPI mode and set DTE speed to 38400 bps.
+H3 Enable RPI mode and set DTE speed to 57600 bps.
+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.
Result Codes:
OK n = 0 to 3, 11.
-SDR=n - Enable/Disable Distinctive Ring
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.-SDR=0 Disables Distinctive Ring. Any valid ring detected is reported as RING (default).
-SDR=1 Enables Distinctive Ring Type 1.
-SDR=2 Enables Distinctive Ring Type 2.
-SDR=3 Enables Distinctive Ring Type 1 and 2.
-SDR=4 Enables Distinctive Ring Type 3.
-SDR=5 Enables Distinctive Ring Type 1 and 3.
-SDR=6 Enables Distinctive Ring Type 2 and 3.
-SDR=7 Enables Distinctive Ring Type 1, 2, and 3.
Result Codes:
OK n = 0 to 7.
ERROR Otherwise.
The n value bit map is:
Bit 0=1 Enable RING type 1. RING type 1 is detected and reported as RING1.
Bit 1=1 Enable RING type 2. RING type 2 is detected and reported as RING2.
Bit 2=1 Enable RING type 3. RING type 3 is detected and reported as RING3.
The ring types supported and the corresponding ring cadence detect criteria are:
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.
Notes:
1. The Ring Indicate (RI) output does not toggle on the first ring if AT-SDR!=0.
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.
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.-SSE=0 Disables DSVD (default).
-SSE=1 Enables DSVD.
Result Codes:
OK n = 0 and 1.
ERROR Otherwise.
3.3 ERROR DETECTION AND DATA COMPRESSION COMMANDS
%C - Enable/Disable Data Compression
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.%C0 Disables data compression. Resets S46 bit 1.
%C1 Enables MNP 5 data compression negotiation. Resets S46 bit 1.
%C2 Enables V.42 bis data compression. Sets S46 bit 1.
%C3 Enables both V.42 bis and MNP 5 data compression. Sets S46 bit 1. (Default.)
Result Codes:
OK n = 0, 1, 2, or 3.
\An - Select Maximum MNP Block Size
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.\A0 64 characters.
\A1 128 characters. (Default.)
\A2 192 characters.
\A3 256 characters.
Result Codes:
OK n = 0 to 3.
\Bn - Transmit Break to Remote
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.In error correction mode, the modem will signal a break through the active error correction protocol, giving no indication of the length.
\B1-\B9 Break length in 100 ms units. (Default = 3.) (Non-error corrected mode only.)
Result Codes:
OK If connected in data modem mode.
NO CARRIER If not connected or connected in fax modem mode.
Note: 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.
)Mn - Enable Cellular Power Level Adjustment
This command is included only for compatibility and performs no function.)M0 )M0 command.
)M1 )M1 command.
)M2 )M2 command.
Result Codes:
OK n = 0 to 2.
This command is included only for compatibility and performs no function.*H0 *H0 command.
*H1 *H1 command.
*H2 *H2 command.
Result Codes:
OK n = 0 to 2.
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.-K0 Disables V.42 LAPM to MNP 10 conversion. (Default.)
-K1 Enables V.42 LAPM to MNP 10 conversion.
-K2 Enables V.42 LAPM to MNP 10 conversion; inhibits MNP Extended Services initiation during V.42 LAPM answer mode detection phase.
Result Codes:
OK n = 0 or 2.
-Qn - Enable Fallback to V.22 bis/V.22
This command is included only for compatibility and performs no function.-Q0 -Q0 command.
-Q1 -Q1 command.
Result Codes:
OK n = 0 or 1.
-SEC=n - Enable/Disable MNP10-EC
Enables or disables MNP10-EC operation. The command format is:-SEC=n,[<tx level>] where <tx level> is the optional transmit level sub parameter.
-SEC=0 Disable MNP10-EC; the transmit level is that defined in S91.
-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.
Result Codes:
OK n=0, 1, or 1 and <tx level>=0 to 30
ERROR Otherwise
Example: AT-SEC=1,18 enables MNP10-EC and sets the transmit level to -18 dBm.
Note: 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.
Inquiries
AT-SEC? Retrieves the current -SEC command settings, e.g., 1,18.
@Mn - Initial Cellular Power Level Setting
This command is included only for compatibility and performs no function.@M0 @M0 command.
.
.
.
@M30 @M30 command.
Result Codes:
OK n = 0 to 30.
:E - Compromise Equalizer Enable Command
This command is included only for compatibility and performs no function.:E0 :E0 command.
:E1 :E1 command.
Result Codes:
OK n = 0 or 1.
*B - Display Blacklisted Numbers
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.Example:
NO. - PHONE NUMBER -
------ ------------------------------
1; 4175537660
2; 8288924961
3; 3887278862
4; 3124839442
5;
6284664
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.
Example:
NO. - PHONE NUMBER -DELAY
------ -------------------------------------------
1; 8264734660 2:00:00
2; 7532634661 2:00:00
3; 2587334662
0:02:00
4; 7532651663 0:03:25
5; 7459931664 0:01:45
Enables or disables Caller ID.
#CID=0 Disables Caller ID. (Default.)
#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.
#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.
Result Codes:
OK n = 0 or 2.
#CID? Retrieves the current Caller ID mode from the modem.#CID=? Returns the mode capabilities of the modem in a list with each element separated by commas.
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.Tag Description
DATE DATE = MMDD where MM is the month number (01 to 12) and DD is the day number (01..31).
TIME TIME = HHMM where HH is the hour number (00 to 23) and MM is the minute number (00 to 59).
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.
NAME NAME = <listing name> where <listing name> is the subscription name.
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.
Notes:
1. The modem does not present any Caller ID information if the DCE detects a checksum error in the Caller ID packet.
2. In the event of an unrecognized data tag, the modem will present the data in ASCII hex numbers following the MESG tag.
Example of Formatted Form Reporting
1. The following example illustrates the standard Caller ID message packet.RING
DATE = 0321
TIME = 1405
NMBR = 5045551234
NAME = A N OTHER
RING
RING
2. The following example illustrates the case where the tag of the packet is not recognized by the modem.
RING
MESG = 060342424231
RING
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.The modem does not detect the checksum of the packet.
Example of Unformatted Form Reporting
RING0412303332323234303539313435353132333435
RING
The Direct Connect Modem allows a direct interface to most cellular telephones eliminating the need for other intelligent interfaces.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.
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.
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).
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.^C2 - Download Cellular Phone Driver
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).^C2 Download Cellular Phone command
Result Codes:
OK
[Download Process]
OK Cellular phone driver download completed successfully
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.
^I - Identify Cellular Phone Driver
The modem reports the identification of the loaded cellular phone driver in response to the ^I command. The response is dependent upon the driver.Result Codes (Typical):
CELLULAR DRIVER: OKI 900/910
(c) Copyright 1994, Spectrum Cellular, Inc.
Version 0.07 Thu Jan 10:29:52 1994
OK
or
ERROR Cellular phone driver is not loaded
^T6 - Indicate Status of Cellular Phone
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:bit 0 1 = Cellular phone is receiving an incoming call
bit 1 1 = Cellular phone is in use
bit 2 1 = Cellular phone is locked (cannot be used)
bit 3 1 = There is no service for cellular phone (does not indicate signal strength)
bit 4 1 = Cellular phone is powered on
bit 5 1 = Cellular driver is initialized
bit 6 0 = Reserved (0)
bit 7 1 = Cellular cable detected
Result Codes (typical):
128 (Cellular cable detected)
OK
While the modem is being used with a cellular phone it will respond with normal result messages with the following differences in meaning:
NO DIALTONE Indicates that cellular service is not currently available.
RING Indicates that the cellular phone is receiving an incoming call.
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.Cell Site AT&F
Base Site AT&F -SEC=1,18
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.
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.
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.
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).
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.
If an AXCELL(TM) solution is used, a transmit level of -10dBm is required, therefore the following init string should be used:
Cell Site AT &F -SEC=1,10
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.
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.
Table 3-2 summarizes the mode and resulting transmit levels for both modems depending on their configuration.
It is recommended that fax transmissions be configured to operate at 9600 bps in V.17 mode or 7200 bps in V.29 mode. 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.Additional information regarding the use of the cellular phone and cellular network should be obtained from the service provider and or cellular phone manufacturer.
Table 3-2. Remote Modem Configuration and Resulting Transmit Levels
Remote Modem Base Site Configuration
(Connected to PSTN)
Configuration
AT&F-SEC=0,x AT&F-SEC=1,x
V.34 V.32bis V.34 V.32bis
V.34
Dir AT&F Mod = Mod = Mod = Mod =
ect
Conn V.32bis
Mode = V.32bis
Mode = V.32bis
Mode = V.32bis
Mode =
ect -EC
RTxlv = Single -EC
RTxlv = -EC
RTxlv =
Driver
BTxlv = -EC
RTxlv = Driver
BTxlv = Driver
BTxlv =
x Driver
BTxlv = x x
-10
AT&F-SEC=1,x Mod = Mod = Mod = Mod =
V.34
Mode = V.32bis
Mode = V.34
Mode = V.32bis
Mode =
-EC
RTxlv = Single -EC
RTxlv = -EC
RTxlv =
x
BTxlv = x -EC
RTxlv = x
BTxlv = x x
BTxlv = x
x
BTxlv = -10
V.32bis
AT&F Mod = Mod = Mod = Mod =
Direct
C V.32bis
Mode = V.32bis
Mode = V.32bis
Mode = V.32bis
Mode =
onnect Single Single -EC
RTxlv = -EC
RTxlv =
-EC
RTxlv = -EC
RTxlv = Driver
BTxlv = Driver
BTxlv =
Driver
BTxlv = Driver
BTxlv = x x
-10 -10
AT&F-SEC=1,x Mod = Mod = Mod = Mod =
V.32bis
Mode = V.32bis
Mode = V.32bis
Mode = V.32bis
Mode =
Single Single -EC
RTxlv = -EC
RTxlv =
-EC
RTxlv = -EC
RTxlv = x
BTxlv = x x
BTxlv = x
x
BTxlv = -10 x
BTxlv = -10
V.34
PST AT&F Mod = Mod = Mod = Mod =
N V.34
Mode = V.32bis
Mode = V.34
Mode = V.32bis
Mode =
non -EC
RTxlv non -EC
RTxlv Single Single
= -10
BTxlv = = -10
BTxlv = -EC
RTxlv = -EC
RTxlv =
-10 -10 -10
BTxlv = x -10
BTxlv = x
V.32bis
AT&F Mod = Mod = Mod = Mod =
PSTN V.32bis
Mode = V.32bis
Mode = V.32bis
Mode = V.32bis
Mode =
non -EC
RTxlv non -EC
RTxlv Single Single
= -10
BTxlv = = -10
BTxlv = -EC
RTxlv = -EC
RTxlv =
-10 -10 -10
BTxlv = x -10
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.
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.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.
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.)
OK (0)
The OK code is returned by the modem to acknowledge execution of a command line.CONNECT (1)
The modem will send this result code upon connecting when:1. The line speed is 300 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2. The DTE speed is 300 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting, or
3. The range of result code responses is restricted by the X command such that no speed reporting is allowed.
RING (2)
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.When cellular interface is selected, RING indicates that the cellular phone is receiving an incoming call.
NO CARRIER (3)
The modem sends this result code when attempting to establish a call if:1. Ringback is detected and later ceases but no carrier is detected within the period of time determined by register S7, or
2. No ringback is detected within the period of time determined by register S7.
This result code is also used when the modem auto-disconnects due to loss of carrier.
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.
ERROR (4)
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.Under X0, X1, X2, and X3, this result is used instead of DELAYED and BLACKLISTED.
CONNECT 1200 (5)
For X1, X2, X3, and X4, the modem sends this result code when:1. The line speed is 1200 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2. The DTE speed is 1200 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
NO DIALTONE (6)
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.When cellular phone interface is selected, NO DIALTONE indicates that cellular service is not currently available.
BUSY (7)
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.NO ANSWER (8)
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.CONNECT 0600 (9)
For X1, X2, X3, and X4, the modem sends this result code when:1. The line speed is 600 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2. The DTE speed is 600 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 2400 (10)
For X1, X2, X3, and X4, the modem sends this result code when:1. The line speed is 2400 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2. The DTE speed is 2400 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 4800 (11)
For X1, X2, X3, and X4, the modem sends this result code when:1. The line speed is 4800 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2. The DTE speed is 4800 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 9600 (12)
For X1, X2, X3, and X4, the modem sends this result code when:1. The line speed is 9600 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2. The DTE speed is 9600 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 7200 (13)
For X1, X2, X3, and X4, the modem sends this result code when:1. The line speed is 7200 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2. The DTE speed is 7200 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 12000 (14)
For X1, X2, X3, and X4, the modem sends this result code when:1. The line speed is 12000 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2. The DTE speed is 12000 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 14400 (15)
For X1, X2, X3, and X4, the modem sends this result code when:1. The line speed is 14400 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2. The DTE speed is 14400 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 19200 (16)
For X1, X2, X3, and X4, the modem sends this result code when:1. The line speed is 19200 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2. The DTE speed is 19200 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 38400 (17)
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.CONNECT 57600 (18)
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.CONNECT 115200 (19)
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.CONNECT 75TX/1200RX (22)
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.CONNECT 1200TX/75RX (23)
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.DELAYED (24)
For X4, the modem returns this result code when a call fails to