User Manual
67
Chapter 4—AT Commands, S-Registers, Result Codes
Command: \Tn Inactivity Timer
Values: n = 0, 1255
Default: 0
Description: \Tn Sets the time (in minutes) that the modem waits after the last character is sent or
received before it disconnects. A value of zero disables the timer. Applies only
in buffer mode.
Note: You can also set the inactivity timer by changing the value of S30.
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
Defaults: 0
Description: \X0 Modem responds to and discards XON/XOFF characters.
\X1 Modem responds to and passes XON/XOFF characters
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: %A Adaptive Answer Result Code Enable
Values: n = 0 or 1
Default: 0
Description: The %A command controls whether the DATA and 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.
Note: For descriptions of the +FAA= and other fax commands, see the Multi-Tech Fax Class 2.1
Developer’s Guide.
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 at-
tempted in the previous two hours failed. In countries that do not require blacklisting,
the ERROR result code appears.
Command: %Cn V.42bis Compression Control
Values: n = 0 or 1
Default: 1
Description: %C0 Disable sV.42bis/MNP 5 data compression.
%C1 Enables V.42bis/MNP 5 data compression.