USRobotics V.34 - Manual (Page 126)

COURIER HIGH SPEED MODEMS
C-4 Alphabetical Command Summary
B n Handshake options for international calls above 1200 bps.
B0 ITU-T (formerly CCITT) answer sequence. Default. This
is required to answer all V.32-type calls as well as calls
from overseas.
B1 Bell answer tone. This setting selects HST modulation in
Dual Standard modems; but should only be used if the
modem is not required to answer V.32-type calls.
NOTE: This setting is required for HST cellular calls.
C n Transmitter enabled/disabled.
C0 Transmitter disabled; receive-only condition.
C1 Transmitter enabled (Default).
D n Dial the specified phone number; also execute Dial options.
The maximum number of characters allowed is 36, including the
AT prefix, punctuation and spaces. The Carriage Return (Enter
key) isn't counted as a character.
NOTE: With the exception of the Dial options, the modem
ignores any commands issued after D in the same command
string.
D Dial the number that follows and enter Originate mode.
Optional parameters:
P Pulse dial (Default).
T Tone dial.
, (Comma) Pause for 2 seconds before continuing to dial.
; Return to Command mode after dialing.
" Dial the letters that follow (in an alphabetical phone
number).
! Transfer a call (flash the switch-hook). This command
applies to modems in installations where other modems
share the phone line. The modem flashes the switch-
hook (goes off hook 0.5 seconds, on hook for 0.5 seconds
and off hook again) to dial the specified extension.
W This command is useful in situations where you must
wait for a second dial tone before continuing dialing.