Western Telematic MT9234 manuale d’uso

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 3. A T Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

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. • The modem is in command mode whenever it is not conn[...]

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. The most familiar command string is the initialization string , which is u[...]

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). Command Description A T Attention Code A Answer A/ Repeat Last Command B n Communication Standard Setting D s Dial DS= y Dial Stored T ele[...]

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 Result Code -C n Data Calling T one %A n Adaptive Answer Result Code Enable %B View Numbers in Blacklist %C n Data Compression Control %DC n A T Co[...]

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. Command: A Answer V alues: N/A Description: Answer call before final ring. Command: A/ R[...]

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 characters long and include the 0–9, *, #, , B, C, and D characters, and the L, P , T , V , W , S, comma (,), semicolon (;), !, @, ^ and $ dial string modi[...]

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. I1 Calculate and display ROM checksum (e.g., 12A[...]

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. Q1 D[...]

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. W2 CONNECT result code reports line speed, enables protocol result codes. Command: X n Re[...]

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. Note: For &L1 and &L2 , there is a 30-seco[...]

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). For tests 3 and 6, a connection be[...]

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-character maximum Command: B n T ransmit Break V alues: n = 0–9 in 100 ms units Default: 3 Description: In non-error-correction mode only , sends a br[...]

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. If the modem cannot make an MNP connection, it disconnects. N3 V .42/MNP auto-reliable [...]

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 . Command: -C n Data Calling T one V alues: n = 0 or 1 Defaults: 1 Description: -C0 Disa[...]

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. Command: %E n Fallback and Fall Forward Contr ol V alues: n = 0, 1, or 2 Default:[...]

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 .23 mode $MB300 Selects 300 bps on-line $MB1200 Selects 1200 bps on-line $[...]

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. y = 0–255 Minimum ring interval in 100 ms units. See description. Default: 0, 0 Description: Enables reporting of ring cadence information to the DTE and specifies the minimum ring cadence tha[...]

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. Command: #CBFR Callback Failed Attempts Reset V alues: N/A Default: N/A Description: Resets the n[...]

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 . #CBS3 Disables callback security until local hang-up or reset. Command: #P n Set 1 1-[...]

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. A TS0=0 disables auto answer completel[...]

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. 0 = maximum speed 1 = reserved 2 = 1200/75 bps 3 = 300 bps 4 = reserved 5 = 1200 bps 6 = 2400 bps 7 = 4800 bps 8 = 7200 bps 9 = 9600 bps 10 = 12000 bps 1 1 = [...]

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. S48=7 S48=128 S36=0, 2 LAPM or hang up Do not use S36=1, 3 LAPM or async Async S36=4, 6 LAPM, MNP , MNP or hang up or hang [...]

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 . T erse V erbose Description 0 OK Command executed 1 CONNECT Modem connected to line 2 RING Ring signal detected 3 NO CARRIER Carrier signal lost or not detect[...]

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 58000 Connected at 58000 bps 84 CONNECT 60000 Connected at 60000 bps 86 CONNECT 16800 Connected at 16800 bps 87 CONNECT 1 15200 Connected at 1 15200 b[...]

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. W ith password-protected remote configuration, you can issue A T commands to a remote modem for maintenance or troubleshooting as if[...]

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] . The modem responds with OK if the setup password is correct and ERROR [...]

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. If you are comfortable using A T commands, you can con?[...]

6-4 MT5634/MT9234 Modem; A T Command Set[...]

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