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T1 Modem Bank
100
D
n
Dial Command
Initiates the dialing sequence. The string n includes the dial modifiers and the telephone number to be
dialed.
Dial Modifiers:
P: Pulse dial. Only digits 0-9 may be used in pulse dial mode.
R: Reverse dial mode. Originates call in answer mode.
S=
n
: Dial stored number. Dials the number stored in location n (0-3).
T Tone DTMF dial. Any digit 0-9, *, #, A, B, C, D may be dialed as a tone.
W Wait for dial tone. The modem waits for dialtone before dialing.
, Pause. Causes the modem to pause before processing the next character in the dial string.
! Flash hook. Causes the modem to go on-hook for 0.5 seconds, then go off-hook again.
@ Wait for quiet answer. Wait for five seconds of silence after dialing the number.
; Return to idle state. Modem returns to command mode after dialing a number, but does not
disconnect call.
E
n
AT Command Echo Options
Enables or disables echo of characters from the modem to the DTE when the modem is in command mode.
E0: Echo disabled.
*E1: Echo enabled.
Result Codes:
OK Returned when
n
= 0 or 1.
ERROR Returned for any other value of
n
.
F
n
Online Echo Command (no operation)
This command is included to provide backward compatibility with communications software that issues this
command.
F0: Returns ERROR.
F1: Online echo disabled.
Result Codes:
OK Returned when
n
= 1.
ERROR Returned for any other value of
n
.
H
n
Switchhook Control
Provides control of the line relay.
H0: Causes modem to go on-hook.
H1: Causes modem to go off-hook, but does not train.
Result Codes:
OK Returned when
n
= 0 or 1.
ERROR Returned for any other value of
n
.