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Chapter 4—AT Commands, S-Registers, Result Codes
Description: \V0 Disable the appending of the protocol result code to
the DCE speed.
\V1 Enable the appending of the protocol result code to the
DCE speed.
\V2 Same as \V1.
Command: \Xn XON/XOFF Pass-Through
Values: n = 0 or 1
Defaults: 0
Description: \X0 Modem responds to and discards XON/XOFF
characters.
\X1 Modem responds to and passes XON/XOFF charac-
ters.
Command: -Cn Data Calling Tone
Values: n = 0 or 1
Defaults: 0
Description: -C0 Disables V.25 data calling tone to deny remote data/fax/
voice discrimination.
-C1 Enables V.25 data calling tone to allow remote data/fax/
voice discrimination.
Command: %B View Numbers in Blacklist
Values: n/a
Description: If blacklisting is in effect, AT%B displays the numbers
of the last failed call attempt in the previous two hours.
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 Disables V.42bis/MNP 5 data compression.
%C1 Enables V.42bis/MNP 5 data compression.
Command: %DCn AT Command Control
Values: n = 0 or 1
Default: 0
Description: %DC0 The modem responds to AT commands.