Reference Information Modem Reference Information Modem Reference Information You can customize the operation of your notebook’s modem using AT commands and S-registers. You can do this from Phone and Modem Options in Control Panel, from most communications software, or by using terminal mode in your software. See “To change your modem settings” on page 57. Note You should have a good understanding of modems and how they operate before you change default settings. This section contains summary information about AT commands, S-registers, and selected result codes for the built-in modem. Modem reference (Ambit) In the following AT command table, default settings are shown in bold.
All listed AT commands except +++, /, and A/ must be preceded by “AT.” AT Commands (Ambit) 134 Reference Guide Command Function (Ambit) A/ Re-execute command (not preceded by AT) A Go off-hook and attempt to answer a call B0 Select V.22 connect @1200 bps B1 Select Bell 212A connect @1200 bps C1 Return OK message Dn Dial modifier E0 Turn off command echo E1 Turn on command echo H0 Initiate a hang-up sequence H1 If on-hook, go off-hook and enter command mode I0 Report product code I1 Report pre-computed checksum I2 Report “OK” if the calculated checksum equals the prestored checksum or if the prestored checksum value is FFh I3 Report firmware revision, model, and interface type I4 Report response programmed by OEM I5 Report the country code parameter I6 Report modem data pump model and code revision I7 Report the DAA code L0 Set low speaker volume L1 Set low speaker volume L2 Set medium speaker volume L3 Set high speaker volume