Compaq 270680-003 Compaq Desktop Management -- Intelligent Manageability for I
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- Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 1
White Paper December 1998 ECG021/1298 Prepared by Portable Marketing Services Compaq Computer Corporation Contents Using Modem Commands ..........3 Entering a Command 3 Editing and Executing a Command 3 Omitting a Parameter in a Command Line 3 Repeating a Command 3 Understanding Result Codes - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 2
by copyright. No part of this guide may be photocopied or reproduced in any form without prior written consent from Compaq Computer Corporation. COMPAQ, ARMADA, and LTE are registered in the U.S. Patent and Trademark Office. Microsoft, MS-DOS, Windows, and Windows NT are registered trademarks of - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 3
Compaq V.90 Integrated Modem Commands 3 Using Modem Commands Entering a Command Use the Enter key function, you are not required to enter the AT prefix or press the Enter key when repeating this command. The last command entered remains in the command buffer until the modem is reset or power - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 4
online session by entering AT0 command or terminate the connection with the ATH0 command. Creating a Command Mode Shortcut An easy way to issue commands to the modem is via HyperTerminal, included with Windows 95, Windows 98, and Windows NT. You can create a shortcut for accessing HyperTerminal and - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 5
Compaq V.90 Integrated Modem Commands 5 The Phone Number dialog box is displayed. 5. Select Connect UsingêDirect to Com 2. 6. Click OK. The Modem Port Settings dialog box is displayed. 7. Click OK. The command mode screen is displayed with a blinking cursor - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 6
Compaq V.90 Integrated Modem Commands 6 AT Command Set AT Data Command Set Summary Command A/ A B Self-test commands View active configuration Store current configuration Select stored profile for hard reset Store telephone number MNP Block Size Send Break Modem port flow control Adjust - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 7
Compaq V.90 Integrated Modem Commands 7 Result Code Summary Result Code OK CONNECT RING NO CARRIER ERROR CONNECT 1200 EC* NO DIALTONE BUSY NO ANSWER CONNECT 2400 EC* CONNECT 4800 EC* CONNECT 9600 EC* CONNECT 14400 EC* CONNECT 19200 EC* CONNECT 7200 EC* CONNECT 12000 EC* CONNECT 16800 EC* CONNECT - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 8
50666 EC* 112 Connection at 50666 bits / s (V.90 mode) CONNECT 53333 EC* 113 Connection at 53333 bits / s (V.90 mode) CONNECT 54666 EC* 114 Connection at 54666 bits / s (V.90 mode) * EC only appears when the extended result codes configuration option is enabled. EC is replaced by one of - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 9
Compaq V.90 Integrated Modem Commands 9 AT Command Descriptions +++ Escape sequence The escape sequence allows the modem to exit data mode and enter online the C1 command. However, this modem does not support the C0 command. The C0 command may instruct some other modems to not send carrier (i.e., - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 10
Compaq V.90 Integrated Modem Commands 10 Result Codes: OK n = 1 ERROR Otherwise Dn Dial This command instructs the modem to begin the dialing sequence. The dial string (n, including modifiers and the telephone number) is entered whether the characters entered from your computer keyboard are - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 11
SUPPORTED, ERROR). F1: Online character echo disabled. Result Codes: OK n = 1 ERROR Otherwise Hn Hook Control This command instructs I9: Returns country code (i.e. NA Ver. 1). I11 Displays connection information as described below: Result Codes: OK n = 0, 1, 2, 3, - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 12
Negotiation Result 7 Data Compression Result 8 Estimated Noise Level 9 Receive Signal Power Level (-dBm) 10 Transmit Signal Power Level (-dBm) 11 Round Trip Delay (msec) Press any key to continue; ESC to quit. K56flex Connection 56K 28800 50000 28800 50000 LAPM V42bis 152 25 16 4 V.90 - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 13
Compaq so it can be useful to sample a few times. The received signal power, although labeled -dBm, is only a relative measure for comparing calls to/ with robbed-bit signaling. 21. For PCM connection only, the downstream digital loss. 22. For K56flex connection only, the V.8bis info sent by the - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 14
Compaq V.90 Integrated Modem whether or not the local modem performs a negotiated handshake at connection time with the remote modem when the communication speed of = 0, 1 ERROR Otherwise On Return Online to Data Mode O0: Instructs the modem to exit online command mode and return to data mode ( - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 15
or off. Q0: Enables modem to send result codes to the computer (default). Q1: Disables modem from sending result codes to the computer. Result Codes: OK n = 0, 1 ERROR Otherwise T Select Tone Dialing This command instructs the modem to send DTMF tones while dialing. Dialed digits are tone - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 16
Compaq V.90 Integrated Modem the basic result codes OK, CONNECT, RING, NO CARRIER, and ERROR. Enabled: Displays basic result codes, along with the connect message and the modem's disabled. Y0: Disable long space disconnect (default). Y1: Enable long space disconnect. NOT SUPPORTED. ECG021/1298 - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 17
auto retrains. &B0: Disable V.32 auto retrain - NOT SUPPORTED. &B1: Enable V.32 auto retrain (default). Result Codes: OK n = 1 ERROR Otherwise &Cn Data Carrier Detect (DCD) Control Data Carrier Detect is a signal from the modem to your computer indicating that the carrier signal is being - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 18
Compaq configuration stored and programmed at the factory. This operation replaces all of the command options and the S-register settings Auxiliary Relay Option &J0: The auxiliary relay is never closed. &J1: NOT SUPPORTED, responds ERROR. Result Codes: OK n = 0 ERROR Otherwise &Kn Local Flow - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 19
Compaq V.90 Integrated Modem Commands 19 Result Codes: OK ERROR n = 0, 3, 4 Otherwise &Mn Asynchronous Communications Mode &M0: Asynchronous mode (default) &M1: Reserved &M2: Reserved &M3: Reserved &M4: - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 20
These tests can help to isolate problems when experiencing periodic data loss or random errors. &T0 Abort. Stops any test in progress. &T1 Local analog loop. This test verifies modem operation, as well as the connection between the modem and computer. Any data entered at the local DTE is modulated - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 21
Compaq V.90 Integrated Modem Commands 21 &V View Active Configuration and Stored Profile This DTR Action Selection Bell Enabled Medium OnUntilCarrier Enabled Tone Text Enabled Enabled Enabled Standard RS232 Standard RS232 Press any key to continue; ESC to quit. AT Command B E L M Q T/P V X X X - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 22
certain command options and S-register values into the nonvolatile memory of the modem. The ATZ command or a power-up reset of the modem restores this profile. Result Codes: OK n = 0 ERROR Otherwise &Yn Select Stored Profile for Hard Reset This command does not change the behavior of the - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 23
Compaq V.90 Integrated Modem Commands 23 \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. \A0: 64 characters \A1: 128 characters \A2: 192 characters \A3: 256 characters (default) Result - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 24
Compaq from the DTE when the modem is operating in data transfer mode: \K0: Enter online command mode, no break sent to remote modem. \K1: Clear data case is where there is a break received from a remote modem during a connection: \K0: Clear data buffers and send break to the DTE. \K1: Clear - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 25
Compaq mode (same as &Q5). \N4: V.42 or disconnect. The modem attempts to connect in V.42 error control mode. If this fails, the call will be disconnected. flow control. Same as &K4. \Q2: CTS-only flow control. This is not supported and the response is ERROR. \Q3: RTS/CTS to DTE (default). Same as - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 26
Compaq V.90 Integrated Modem Commands 26 Result Codes: OK ERROR n = 0-255 Otherwise \Vn Protocol Result Code \V0: Disable protocol result code appended to DCE speed. \V1: - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 27
Compaq V.90 Integrated Modem Commands 27 The table below shows the possible values of n: "AT-V90=n" 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 28
Compaq V.90 Integrated Modem Commands 28 %En Enable/Disable Auto-Retrain and Fallback/Fall Forward Provides option ? Returns the current values of and / VDR+? Queries the DCE for the range of supported distinctive ring configurations. DCE returns: (0,1), (0-255) ECG021/1298 - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 29
Compaq V.90 Integrated Modem Commands 29 S Registers Setting S Register Default Values The the Terminal Mode (Command Mode), type ATSn? (where n is the number of the register), then press Enter. When modifying a register, the modem also remembers the location of the last inquiry. For example, the - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 30
Compaq V.90 Integrated Modem Commands 30 S-Register Summary Register Default Description S0 0 character S5 8 Command line editing character S6 2 Wait before dialing S7 50 Connection completion time-out S8 2 Comma dial modifier time S10 20 Automatic disconnect delay S11 - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 31
Compaq V.90 Integrated Modem Commands 31 S-Register Descriptions S0 Auto Answer Ring Number This register determines the number of rings the modem will count before automatically answering a call. Enter when it responds to the computer. Range: 0-127, ASCII decimal Default: 10 (line feed) Units: - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 32
Compaq V.90 Integrated Modem Commands 32 S5 Command Line Editing Character (user by some ATX options according to country restrictions. Range: 2-65 Default: 2 Units: seconds S7 Connection Completion Time-Out This register sets the time, in seconds, that the modem must wait before hanging - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 33
Compaq V.90 Integrated Modem Commands 33 S10 Automatic Disconnect Delay This register sets the length of time, in tenths of a second, that the modem waits before - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 34
Compaq V.90 Integrated Modem Commands 34 S21 V.24/General Bit Mapped Options Status Indicates zero prevents standby mode. S24 is an alias for S89. Note: If a number between 1 and 4 is entered for this register, it will set the value to 5, and the inactivity before standby will be 5 seconds. This - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 35
Compaq V.90 Integrated Modem Commands 35 S28 V.34 Modulation Enable/Disable This register enables/disables V.34 modulation. 0 = disabled, 1-255 = enabled Range: 0-255 Default: 1 S30 Inactivity Timer - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 36
Compaq V.90 Integrated Modem Commands 36 S37 Dial Line Rate (default 0) This register sets the maximum line data rate. In K56flex and V.90 mode, S37 S38=0 disables K56flex, and may allow a more reliable V.34 connection. S38=1 default allows the modem to select the downstream rate automatically - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 37
Compaq V.90 Integrated Modem Commands 37 S38 = 6 40000 bits/s S38 = 7 42000 bits/s S38 = 8 44000 bits/s S38 = 9 46000 bits/s S38 = 10 48000 bits/s S38 = 11 50000 bits/s - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 38
Compaq V.90 Integrated Modem Commands 38 S48 LAPM Error Control and Feature Negotiation ( into standby mode. A value of zero prevents standby mode. Note: If a number between 1 and 4 is entered for this register, it will set the value to 5, and the inactivity before standby will be 5 seconds. This - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 39
Compaq V.90 Integrated Modem Commands 39 AT FAX Command Set Class 1 FAX Commands The Lucent Technologies HSM Data/FAX Complete Chip Set supports +FAA = ? +FAA? Description Service class indication Service class capabilities Service class selection Transmission silence Receive silence Transmit - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 40
Compaq V.90 Integrated Modem Commands 40 AT FAX Command Set Descriptions +FCLASS? Service Class Indication This +FCLASS=? Service Class Capabilities This command causes the modem to display the classes it supports. Typical responses: +FCLASS = ? 0, 1 +FCLASS=n Service Class Selection This - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 41
Compaq V.90 Integrated Modem Commands 41 +FTM= Transmit FAX Data with Carrier This command causes the modem to transmit data at the modulation specified by . The following chart shows the values you can enter for this command and the meaning of those values. Command Option +FTM=3 +FTM= - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 42
Compaq V.90 Integrated Modem Commands 42 +FTH=Transmit HDLC Data with Carrier This command causes the modem to transmit data framed in the HDLC protocol at - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 43
Compaq V.90 Integrated Modem Commands 43 +FPR= Select Fax port rate This command sets the DTE to DCE fax port rate. DTE command +FPR = 0 +FPR = 1 +FPR = 2 +FPR = 4 +FPR = 8 +FPR = 10 +FPR = 18 +FPR = ? (if all values listed above are supported FAA Adaptive Answer A Service Class 1 Facsimile - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 44
Compaq V.90 Integrated Modem Commands 44 Note: The +FAA parameter controls automatic switching only from Class 1 to Class 0 for call answering only. It does not affect - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 45
specifications: • Manufacturer Identification (+GMI?) • Version/Revision Information (+GMR?) • Modem Identification (+GMM?) The chip set supports the following functionalities of the V.25ter for a H.324 call: • The modified function of the ATD command when issued while the analog voice connection - Compaq 270680-003 | Compaq Desktop Management -- Intelligent Manageability for I - Page 46
Compaq V.90 Integrated Modem Commands 46 V.80 AT Command Set The chip set supports the Synchronous Access Mode and most of the Initiate Synchronous Access Mode when the data state is entered. Initiate Synchronous Access Mode when connection is completed and Data State is entered. Controls
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White Paper
December 1998
ECG021/1298
Prepared by
Portable Marketing Services
Compaq Computer Corporation
Contents
Using Modem Commands
..........
3
Entering a Command
................
3
Editing and Executing a
Command
.................................
3
Omitting a Parameter in a
Command Line
.........................
3
Repeating a Command
.............
3
Understanding Result Codes
.....
3
Using Online Mode
...................
4
Escaping from an Online
Session to the Command
Mode
........................................
4
Creating a Command Mode
Shortcut
....................................
4
Creating a Command Mode
Icon
..........................................
4
AT Command Set
.......................
6
AT Data Command Set
Summary
..................................
6
Result Code Summary
..............
7
AT Command Descriptions
........
9
S Registers
...............................
29
Setting S Register Default
Values
....................................
29
Modifying an S Register
..........
29
Reading an S Register
............
29
S-Register Summary
...............
30
S-Register Descriptions
...........
31
AT FAX Command Set
..............
39
Class 1 FAX Commands
.........
39
AT FAX Command Set
Summary
................................
39
AT FAX Command Set
Descriptions
............................
40
V.25ter AT Command Set
.........
45
V.25ter AT Commands
............
45
V.80 AT Command Set
.............
46
V.80 AT Commands
................
46
Compaq V.90
Integrated Modem Commands
Abstract:
This document includes comprehensive coverage of the
following topics:
•
AT command set and S registers used to control modem
functionality at an advanced level
•
AT FAX command set to control fax communications