HP Pavilion xh545 HP Pavilion Notebook N5400 and XH500 Series PC's - Reference - Page 123
Modem Reference Information
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Specifications and Regulatory Information Modem Reference Information Modem Reference Information Note If your computer has a built-in modem, you can customize the operation of the 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 62. 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 (with an Ambit chip), which is included with selected models of the HP notebook PC. Command A/ A B0 B1 C1 Dn E0 E1 H0 H1 I0 I1 I2 I3 I4 I5 I6 I7 L0 L1 L2 L3 AT commands (Ambit) In the following AT command table, default settings are shown in bold. All listed AT commands except A/ must be preceded by "AT." Function (Ambit) Re-execute command (not preceded by AT) Go off-hook and attempt to answer a call Select V.22 connect @1200 bps Select Bell 212A connect @1200 bps Return OK message Dial modifier Turn off command echo Turn on command echo Initiate a hang-up sequence If on-hook, go off-hook and enter command mode Report product code Report pre-computed checksum Report "OK" if the calculated checksum equals the prestored checksum or if the prestored checksum value is FFh Report firmware revision, model, and interface type Report response programmed by OEM Report the country code parameter Report modem data pump model and code revision Report the DAA code Set low speaker volume Set low speaker volume Set medium speaker volume Set high speaker volume Reference Guide 123