Compaq 1592DMT Compaq Armada 1500 Family of Personal Computers Maintenance and - Page 172

Table C-1 Continued Command Dn En Hn In Ln Mn Description Dial Command. ATD causes the modem to dial the number that follows D in the command line. The valid dial digits and dial modifiers are defined in the Dial Modifiers table. Parameters: none NOTE: In some countries, a telephone number is required after the ATD command. In pulse dialing, nondigit characters have no effect. Command Echo Option. ATEn disables or enables the local echo of entered characters while the modem is in the command mode. Parameters: n = 0, 1 n = 0 Disables local echo n = 1 Enables local echo (default) Hook Control Option. ATHn controls the on-hook relay. Parameters: n = 0, 1 n = 0 Modem on-hook (hang-up) (default) n = 1 Modem off-hook NOTE: The H1 command is not permitted in some countries. In those cases, ATH1 returns an error. Request Identification Option. ATIn interrogates the modem for its product identification code, ROM checksum, or ROM checksum status. Parameters: n = 0, 1, 2, 4, 9 n = 0 Returns firmware version n = 1 Calculates ROM checksum and displays it (for example, 12AB) n = 2 Performs ROM check, calculates and verifies the checksum, then displays OK or ERROR n = 4 Returns software version of the data pump n = 9 Returns country code Monitor Speaker Volume. ATLn sets the speaker volume during fax and data communications to low, medium, or high. Parameters: n = 0 - 3 n = 0 Low volume n = 1 Low volume n = 2 Medium volume (default) n = 3 High volume NOTE: To turn the speaker completely off, use the M0 command. Speaker Control Option. ATMn controls the speaker on/off operation during fax and data communications. Parameters: n = 0 - 3 n = 0 Speaker off n = 1 Speaker on until carrier is detected (default) n = 2 Speaker always on when modem is off-hook n = 3 Speaker on after dialing until carrier is detected C-2 Modem Commands