Chapter 4 - AT Commands, S-Registers and Result Codes
MT4X56USB 47
Command: \VnProtocol Result Code
Values: n = 0, 1, or 2
Default: 1
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: \XnXON/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: -CnData Calling Tone
Values: n = 0 or 1
Defaults: 0
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: %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: %CnData 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: %DCnAT 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.
Command: %EnFallback and Fall Forward Control
Values: n = 0, 1, or 2
Default: 2
Description: %E0 Disable fallback and fall forward.
%E1 Enable fallback, disable fall forward.
%E2 Enable fallback and fall forward.
Command: #Sx Enter Setup Password
Values: x= password (1–8 characters, case sensitive)
Default: MTSMODEM
Description: Enters the remote configuration setup password.
Command: #S=x Store Setup Password
Values: x= password (1–8 characters, case sensitive)
Default: MTSMODEM
Description: Stores a new remote configuration setup password.