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Reference Information
Modem Reference Information
Reference Guide 139
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 A/ must be preceded by “AT.”
AT Commands (Ambit)
Command Function (Ambit)
Basic and Extended AT Commands
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
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 modem speed
I1 Report chip set
I2 Report DSP code revision
I3 Report controller code revision
I4 Report manufacturer name
I5 Report board name
I6 Report OK
I7 Report OK
I9 Report data/TAM/handset/speakerphone
I10 Report DSP code details
I11 Report controller code details
I12 Report driver time stamp