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3-11
AT Commands
Command: \Xn XON/XOFF Pass-Through
Values: n = 0 or 1
Default: 0
Description: \X0 Modem responds to and discards XON/XOFF characters.
\X1 Modem responds to and passes XON/XOFF characters.
Note: This is also controlled via &E6 and &E7.
Command: -Cn Data Calling Tone
Values: n = 0 or 1
Defaults: 1
Description: -C0 Disable V.25 data calling tone to deny remote
data/fax/voice discrimination.
-C1 Enable V.25 data calling tone to allow remote
data/fax/voice discrimination.
Command: %An Adaptive Answer Result Code Enable
Values: n = 0 or 1
Default: 0
Description: The %A command controls whether the DATA or FAX result
codes will be sent by the modem. The modem must be in fax
mode for this command to work. Also, the modem must be set
to +FAA=1
, which enables the modem to distinguish between
a fax and a data call. When these commands are enabled, the
modem sends DATA to the computer when it detects data tones
and FAX when it detects fax tones. These strings are used by
some servers to select the appropriate communication program.
%A0 Disables adaptive answer result codes.
%A1 Enables adaptive answer result codes.
Command: %B View Numbers in Blacklist
Values: N/A
Description: If blacklisting is in effect, AT%B
displays the numbers for
which the last call attempted in the previous two hours failed.
In countries that do not require blacklisting, the
ERROR
result code appears.
Command: %Cn Data Compression Control
Values: n = 0 or 1
Default: 1
Description: %C0 Disable V.42bis/MNP 5 data compression.
%C1 Enable V.42bis/MNP 5 data compression.