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Chapter 1 – AT Commands, S-Registers and Result Codes
Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C) 16
Command: \Vn Protocol Result Code
Values: n = 0, 1, or 2
Default: 1
Description: \V0 Disables the appending of the protocol result code to the DCE speed.
\V1 Enables 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
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: %A 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.
Command: %DCn AT Command Control
Values: n = 0 or 1
Default: 0
Description: %DC0 The modem responds to AT commands.
%DC1 The modem ignores AT commands.
Note: The modem will respond to AT%DC for 10 seconds after power-up.