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AT Commands
Modem 3600 5-15
Hook Flash !
To flash the switchboard, insert an exclamation mark in the dialing
sequence.
AT D T 9W 323-8000 ,!, #7 377
This inserts a 0.5 second on hook condition, usually for transferring a
call or similar use.
In this example, the modem tone dials a 9, waits for the second dial
tone, dials the phone number, pauses, flashes to start the transfer, pauses
a second time, then uses #7 to transfer the call to extension 377.
Switching to Answer Mode after Dialing R
To switch to answer mode after dialing, use an R at the end of the dial
sequence.
AT D 554-2345 R
Use this command suffix to call an originate-only modem.
Remaining in Command Mode ;
To remain in command mode after dialing, place a semicolon at the end
of the dial sequence.
AT D 234-5678;
The modem will dial the telephone number entered but will not attempt
to train when the remote service answers the call.
This is used to retain control so that further dialing tones may be entered
with the following:
AT DTn;
where n= additional tones to be sent.
Wait for 5 Seconds of Silence @
To wait for 5 seconds of silence (no answer back tone) after accessing
an electronic service, use the @ command in the dialing sequence.
AT D 399-4700 @ 2251 ;
In this example the modem dials the number and, after the connection,
waits for 5 consecutive seconds of silence. The modem then sends
service code 2251 and returns to command mode for further input.