Westermo TD-22 - Manual (Page 12)

13 6177-2203
AT COMMAND SET
The modem will respond to the commands detailed below. Parameters applicable to each command
are listed with the command description.
A/ – Re-execute Command
The modem behaves as though the last command line had been re-sent by the DTE. ”A/” will repeat
all the commands in the command buffer.
The principal application of this command is to place another call (using the Dial command) that
failed to connect due to a busy line, no answer, or a wrong number. This command must appear alone
on a command line. This command should not be terminated by a carriage return.
A – Answer
The modem will go off-hook and attempt to answer an incoming call if correct conditions are met.
Upon successful completion of answer handshake, the modem will go on-line in answer mode. This
command may be affected by the state of Line Current Sense, if enabled. (Most countries do not
require Line Current Sense.) Operation is also dependent upon country-specific requirements.
Please also refer to ATDn, S0, S1, S7, S8, S9 and S30.
\An – Select Maximum MNP Block Size
The modem will operate an MNP error corrected link using a maximum block size controlled by the
parameter supplied. The parameter value, if valid, is written to S40 bits 6 and 7.
\A0 64 characters.
\A1 128 characters.
\A2 192 characters. (Default.)
\A3 256 characters.
Please also refer to AT\N
&An – Dial Abort Option
The modem normally aborts the connection negotiation if a character is received from DTE during
the connection phase. This command give the user the option to let the modem ignore incoming
characters.
&A0 Enable abort. (Default.)
&A1 Disable abort.
Please also refer to AT&D
Bn – CCITT or Bell
When the modem is configured to allow either option, the modem will select Bell (American
standard) or CCITT (European standard) modulation for a line speed connection of 300 or 1200 bps
according to the parameter supplied. Any other line speed will use a CCITT modulation standard.
B0 Selects CCITT operation at 300 or 1200 bps. (Default.)
B1 Selects BELL operation at 300 or 1200 bps
Please also refer to ATFn, S27