40
PORTABLE USB MODEM
Command:
C
n
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:
D
s
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
