AT Commands
Use spaces, hyphens, parentheses, or other punctuation, except dial
modifiers, to make the command line easier to read and enter. For
example, these are all treated the same:
AT D 1-800-555-1212
AT D 1 (800) 555-1212
ATD18005551212
The dial modifiers are as follows.
Command
T
P
,
W
!
R
;
@
S
Tone Dialing — T
To tone dial a number sequence, insert a T in the dial sequence.
AT D T 323-1111
In this example, the modem tone dials the telephone number. The
dialing method selected remains in effect until changed.
Pulse Dialing — P
To pulse dial a number sequence, insert a P in the dial sequence.
AT D P 554-9902
Insert Long Pause — ,
To insert a long pause in the dialing sequence, use a comma. This inserts
a 2 second delay (or the value in register S8).
AT D P 9, 1-800-554-1000
Here the modem pulse dials a 9, pauses for the telephone system to
switch to an outside line, then dials the phone number. Comma pauses
may be inserted consecutively if desired.
5-14
Operation
Tone dialing
Pulse dialing
Insert a long pause (2 sec or value in S8)
Wait for 2nd dial tone
Flash (1/2 sec)
Switch to answer mode after dialing
Return to command mode after dialing
Wait for silence
Dial stored command line or number
V.3600