Dell Inspiron 1120 Contents: Mini PCI Type 3B Data Fax Modem by 3Com User's Gu - Page 2

Back to Contents Page Modem AT Commands: Mini PCI Type 3B Data Fax Modem by 3Com User's Guide Modem AT Commands CAUTION: In most cases, your modem will work using the factory-set defaults. We recommend that you have a good understanding of modems before you change any settings. You can enter modem commands from several places, but the most common way is from terminal mode in your communications software. The basic rules for entering AT commands follow: l Type commands in either upper or lower case, not a combination. l You can enter up to 60 characters, not counting AT, carriage returns, or spaces (spaces are not necessary when entering several (a string of) AT commands at once; they just make it easier to read). l If you leave the number off a command, zero is assumed. For example, if you type ATE, ATE0 is assumed. l Every command except A/ and +++ must be prefixed with AT and completed by pressing Enter. l The modem will respond with OK, ERROR, or other result codes (see the result code summary below). For example, follow these steps if you want to view the version of firmware used in your modem. 1. Check the following table to find the AT command that controls viewing firmware information. The functions are listed in alphabetical order. Note that the AT command for displaying the firmware version is I7. 2. Enter your communications software. 3. Enter Terminal mode. 4. Because almost all commands must be preceded by AT to get the modem's attention, prefix the command with AT. Type ATI7 and press Enter. The firmware version will be displayed. To view defaults, widen the right-hand side of the view window. Command +++ / A A/ D DT DP DR DTnWn DTWn@ DTn!n DTn#n DTn,n DTn*n DTn;n DTn$n DTn&n DTn"n D$ DL Syntax +++ Function Escape to online command mode (not preceded by AT) / ATA Pause (not preceded by AT) Answer manually A/ Repeat last command (not preceded by AT) ATD Dial n Phone #, 0 through 9 ATDT T Tone dial ATDP P Pulse dial ATDR R Call an originate-only modem ATDTnWn W Wait for second dial tone (X2, X4) ATDTWn@ @ Wait for answer (X3, X4) ATDTn!n ! Flash switch hook ATDTn#n # Auxiliary tone dial digit ATDTn,n ATDTn*n , Pause in dialing (S8) * Auxiliary tone dial digit ATDTn;n ; Stay in command mode after dialing ATDTn$n $ Wait for calling card bong ATDTn&n & Wait for calling card bong ATDTn"n " Set quote mode for the following ATD$ Display a list of dial commands ATDL Redial last number Default 125 ms 2 seconds