At Commands Detail - Multitech ISI5634UPCI/4 Command Reference Manual

AT Commands Detail

Command: AT Attention Code
Values: n/a
Description: The attention code precedes all command lines except A/ and escape sequences.
Command: A Answer
Values: n/a
Description: Answer an incoming call before the final ring.
Command: A/ Repeat Last Command
Values: n/a
Description: Repeat the last command string. Do not precede this command with AT. Do not press E
to execute.
Command: Bn Communication Standard Setting
Values: n = 0-3, 15, 16
Default: 1 and 16
Description: B0
B1
B2
B3
B15 Select V.21 when modem is at 300 bps.
B16 Select Bell 103 when modem is at 300 bps.
Command: Ds Dial
Values: s = dial string (phone number and dial modifiers)
Default: none
Description: Dial telephone number s, where s may be up to 40 characters long and include these
characters: 0-9, *, #, A, B, C, D
Can also include these Dial String Modifiers: L, P, T, W, S, comma (,), semicolon (;), !, @, ^,
and $.
Dial String Characters and Modifiers
Multi-Tech Systems, Inc. AT Commands for the MT5634 Family of Products (S000272H)
Select ITU-T V.22 mode when modem is at 1200 bps
Select Bell 212A when modem is 1200 bps.
Deselect V.23 reverse channel (same as B3).
Deselect V.23 reverse channel (same as B2).
0-9 DTMF digits 0 to 9.
* The 'star' digit (tone dialing only).
# The 'gate' digit (tone dialing only).
A-D Some countries may prohibit sending of these digits during dialing (tone dialing
only)
L Redial last number. (Must be placed immediately after ATD.)
P Selects pulse dialing until a T is encountered. Affects current and subsequent
dialing. Some countries prevent changing dialing modes after the first digit is
dialed.
T Selects tone dialing until a P is encountered. Affects current and subsequent
dialing. Some countries prevent changing dialing modes after the first digit is
dialed.
W Wait for a new dial tone before continuing to dial. (X2, X4, X5, X6, or X7 must be
selected).
S=n Dial the number stored in the directory (n = 0 to 3). (See &Z.)
, Pause during dialing for set set in in register S8.
; Return to command mode after dialing. Place at the end of dial string.
! Hook Flash. Causes the modem to go on-hook for a time defined by the value of
S29, then off-hook again. Country requirements may limit the time imposed.
@ Wait for quiet answer (silence). Causes the modem to wait for a ring back, then 5
seconds of silence before processing the next part of the command. If silence is
not detected, the modem returns a NO ANSWER code.
^ Toggles the calling tone between enable/disable. Applicable to current dial
attempt only.
$ Detect AT&T call card "bong" tone. The character should follow the phone
number and precede the user's call card number:
ATDT1028806127853500$123456789
Chapter 1 – AT Commands
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