A-Answer; B<Value>-Communication Standard Setting; C<Value>-Carrier Control; D<Dial String>-Dial - US Robotics 56 K SOFTMODEM - COMMAND REFERENCE REV 1 Command Reference Manual

A—Answer
B<value>—Communication Standard Setting
Result codes:
Command
B0
B1
B2
B3
B15
B16
C<value>—Carrier Control
Result codes:
Command
C1
D<dial string>—Dial
This command instructs the 56K Softmodem to go off-hook and answer an
incoming call.
Use this command to select the communication standard used by the 56K
Softmodem.
OK if <value> = 0—3, 15, 16.
ERROR if <value> does not equal 0—3, 15, 16.
Table 3-1: B<value> Commands
Selects CCITT V.22 mode when the modem is at 1200 bits/s.
Selects Bell 212A when the modem is at 1200 bits/s (default).
Deselects V.23 reverse channel (same as B3).
Deselects V.23 reverse channel (same as B2).
Selects V.21 when the modem is at 300 bits/s.
Selects Bell 103J when the modem is at 300 bits/s (default).
This command is supported to ensure compatibility with communications software
that issues the C1 command. However, this modem does not support the C0
command. The C0 command instructs some modems not to send carrier (i.e., it
puts them in receive-only mode).
OK if <value> = 1.
ERROR if <value> does not equal 1.
Table 3-2: C<value> Commands
Normal transmit carriet switching (default).
This command instructs the 56K Softmodem to go off-hook and begin the dialing
Function
Function
56K Softmodem
Command Reference
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