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PORTABLE USB MODEM
Command: Cn Carrier Control
Values: n=1
Default: 1
Description: C0 Transmit carrier always off. (Not supported.)
C1 Normal transmit carrier switching (included for
backward compatibility with some software).
Command: Ds Dial
Values: s=dial string (phone number and dial modifiers)
Default: none
Description: Dial telephone number s, where s may up to
40 characters long and include the 0–9, *, #, A, B, C,
and D characters, and the L, P, T, V, W, S, comma
(,), semicolon (;), !, @, ^, and $ dial string
modifiers.
L Redial last number. (Must be placed
immediately after ATD.)
P Pulse-dial following numbers in command.
T Tone-dial following numbers in command
(default).
V Switch to speakerphone mode and dial the
following number. Use ATH command to hang up.
W Wait for a new dial tone before continuing to
dial. (X2, X4, X5, X6, or X7 must be selected.)
, Pause during dialing for time set in register S8.
; Return to command mode after dialing. (Place
at end of dial string.)
! Hook flash. Causes the modem to go on-hook
for one-half second, then off-hook again.
@ Wait for quiet answer. Causes modem to wait
for a ringback, then 5 seconds of silence, before
processing next part of command. If silence is not
detected, the modem returns a NO ANSWER code.
^ Disable data calling tone transmission.
$ Detect AT&T call card “bong” tone. The
character should follow the phone number and
precede the user’s call card number:
ATDT1028807637853500$123456789