Alphabetic Command Summary - 3Com Courier Reference

B-2 A B: A
PPENDIX LPHABETIC
C S
OMMAND UMMARY
Command Function
Bn Set handshaking options.
B0
B1
Cn Enable or disable the transmitter.
C0
C1
With the exception of the Dial options, modems ignore any commands
issued after D in the same command string.
Command Function
Dn Dial a phone number and issue other optional commands.
The numbers 0-9 are accepted. The maximum number of
characters allowed is 36, including the AT prefix, punctuation,
and spaces.
Optional parameters:
P
T
,
;
"
W
@
/
R
ITU-T V.25 answer sequence; required to
answer all V.34-type and overseas calls.
Bell answer tone. This setting selects HST
modulation, but use it only if the modem is
not required to answer V.34-type calls.
Transmitter disabled; for receiving only.
Transmitter enabled.
Dial using pulses. Accepted but ignored.
Dial using tones. Accepted but ignored.
(Comma) Pause for 2 seconds (or the time in
S-Register 8). Accepted but ignored.
(Semicolon) Remain in Command mode after
dialing.
Dial the letters that follow.
Wait for a second dial tone before continuing
to dial (with X3 or higher). Accepted but
ignored.
Wait for an answer (with X3, X4, or X7).
Accepted but ignored.
Pause for 125 milliseconds. Accepted but
ignored.
Reverse frequencies. Use this command
when calling an originate-only modem. It
forces the modem to dial out at the answer
frequency.