Instruction/ maintenance manual of the product MT5634 Western Telematic
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WTI Part No. 13513 Rev . B MT5634/MT9234 Internal Modem A T Command Set.
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i T able of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 2. A T Command Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ii MT5634/MT9234 Modem; A T Command Set.
1-1 1. Introduction The A T commands are used to control the operation of your modem. They are called A T commands because the characters A T must precede each command to get the A Ttention of the modem. A T commands can be issued only when the modem is in command mode or online command mode.
1-2 MT5634/MT9234 Modem; A T Command Set Y ou can issue several commands in one line, in what is called a command string . The command string begins with A T and ends when you press [Enter] . Spaces to separate the commands are optional; the command interpreter ignores them.
2-1 2. A T Command Summary Organization of A T Commands on the following pages: 1st, by the initial command character (&, +, %), 2nd, alphabetized by the second command character (Except for listing of A T).
2-2 MT5634/MT9234 Modem; A T Command Set Command Description B n T ransmit Break K n Break Control N n Error Correction Mode Selection Q n Flow Control Selection T n Inactivity T imer V n Protocol Res.
3-1 3. A T Commands Command: A T Attention Code V alues: N/A Description: The attention code precedes all command lines except A/ , A: and escape sequences. Command: [Enter] Key V alues: N/A Description: Press the [Enter] (RETURN) key to execute most commands.
3-2 MT5634/MT9234 Modem; A T Command Set Command: D s Dial V alues: s = dial string (phone number and dial modifiers) Default: none Description: Dial telephone number s , where s may up to 40 charact.
3-3 A T Commands Command: H n Hook Control V alues: n = 0 or 1 Default: 0 Description: H0 Go on-hook (hang up). H1 Go of f-hook (make the phone line busy). Command: I n Information Request V alues: n = 0–5, 9, 1 1 Default: None Description: I0 Display default speed and controller firmware version.
3-4 MT5634/MT9234 Modem; A T Command Set Command: P Pulse Dialing V alues: P , T Default: T Description: Configures the modem for pulse (non-touch-tone) dialing. Dialed digits are pulsed until a T command or dial modifier is received. Command: Q n Result Codes Enable/Disable V alues: n = 0 or 1 Default: 0 Description: Q0 Enable result codes.
3-5 A T Commands Command: W n Result Code Options V alues: n = 0, 1, or 2 Default: 2 Description: W0 CONNECT result code reports serial port speed, disables protocol result codes. W1 CONNECT result code reports serial port speed, enables protocol result codes.
3-6 MT5634/MT9234 Modem; A T Command Set Command: &D n Data T erminal Ready (DTR) Control V alues: n = 0, 1, 2, or 3 Default: 2 Description: &D0 Modem ignores true status of DTR signal and responds as if it is always on. &D1 If DTR drops while in online data mode, the modem enters command mode, issues an OK , and remains connected.
3-7 A T Commands Command: &L n Leased Line Operation V alues: n = 0, 1, or 2 Defaults: 0 Description: &L0 The modem is set for standard dial-up operation. &L1 The modem is set for leased line operation in originate mode. &L2 The modem is set for leased line operation in answer mode.
3-8 MT5634/MT9234 Modem; A T Command Set Command: &T n Loopback T est (V .54 T est) Commands V alues: n = 0, 1, 3, 6 Default: None Description: The modem can perform selected test and diagnostic functions. A test can be run only when the modem is operating in non-error- correction mode (normal or direct mode).
3-9 A T Commands Command: A n Select Maximum MNP Block Size V alues: n = 0, 1, 2, or 3 Default: 3 Description: A0 64-character maximum A1 128-character maximum A2 192-character maximum A3 256-characte.
3-10 MT5634/MT9234 Modem; A T Command Set Command: N n Error Corr ection Mode Selection V alues: n = 0–5, or 7 Default: 3 Description: N0 Non-error correction mode with data buffering (buf fer mode; same as &Q6 ). N1 Direct mode. N2 MNP reliable mode.
3-11 A T Commands Command: X n XON/XOFF Pass-Through V alues: n = 0 or 1 Default: 0 Description: X0 Modem responds to and discards XON/XOFF characters. X1 Modem responds to and passes XON/XOFF characters. Note: This is also controlled via &E6 and &E7 .
3-12 MT5634/MT9234 Modem; A T Command Set Command: %DC n A T Command Control V alues: n = 0 or 1 Default: 0 Description: %DC0 The modem responds to A T commands. %DC1 The modem ignores A T commands. Note: The modem will respond to A T%DC for 10 seconds after power-up.
3-13 A T Commands Command: $EB n Asynchronous W ord Length V alues: n = 0 or 1 Default: 0 Description: $EB0 Enables 10-bit mode. $EB1 Enables 11-bit mode. Command: $MB n Online BPS Speed V alues: n = speed in bits per second Default: 28,800 Description: $MB75 Selects CCITT V .
3-14 MT5634/MT9234 Modem; A T Command Set Command: +VDR= x , y Distinctive Ring Report V alues: x = 0, 1 Distinctive Ring report control. See description.
3-15 A T Commands Command: #CBF? Callback Failed Attempts Display V alues: N/A Default: N/A Description: Requests the number of failed callback passwords since reset or power-up. This number can be stored to nonvolatile memory using the &W command.
3-16 MT5634/MT9234 Modem; A T Command Set Command: #CBS n Callback Enable/Disable V alues: n = 0, 1, 2, or 3 Default: 0 Description: #CBS0 Disables callback security . #CBS1 Enables local and remote callback security . #CBS2 Enables remote callback security only .
4-1 4. S -R egisters Certain modem values, or parameters, are stored in memory locations called S-Registers. Use the S command to read or to alter the contents of S-Registers (see previous section). Register Unit Range Default Description S0 1 ring 0, 1–255 1 Sets the number of rings until the modem answers.
4-2 MT5634/MT9234 Modem; A T Command Set Register Unit Range Default Description S37 decimal 0–19 0 Sets the maximum V .34 "upstream" speed at which the modem attempts to connect.
4-3 S-Registers Register Unit Range Default Description S48 decimal 7 or 128 7 Enables (7) or disables (128) LAPM negotiation. The following table lists the S36 and S48 configuration settings for certain types of connections.
4-4 MT5634/MT9234 Modem; A T Command Set.
5-1 5. Result Codes In command mode your modem can send responses called Result Codes to your computer . Result codes are used by communications programs and can also appear on your monitor .
5-2 MT5634/MT9234 Modem; A T Command Set T erse V erbose Description 80 CONNECT 52000 Connected at 52000 bps 81 CONNECT 54000 Connected at 54000 bps 82 CONNECT 56000 Connected at 56000 bps 83 CONNECT .
6-1 6. Remote Configuration and Country Code Configuration 6.1. Remote Configuration Remote configuration is a network management tool that allows you to configure modems anywhere in your network from one location.
6-2 MT5634/MT9234 Modem; A T Command Set 6.1.2.1. Changing the Setup P assword 1. Open a data communications program such as HyperT erminal. 2. In the terminal window , type A T#SMTSMODEM (or A T#Syyyyyy if you have replaced the MTSMODEM password with yyyyyy) and press [Enter] .
6-3 Remote Confi guration and Country Code Confi guration 6.2. Country Code Configuration Different countries have dif ferent requirements for how modems must function. Therefore, before you use the modem, you must configure it to match the defaults of the country in which you are using it.
6-4 MT5634/MT9234 Modem; A T Command Set.
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