MultiModemDSVD User Guide 4 AT Commands, S-Registers, and Result Codes
24
AT Command Summary
Command: AT Attention Code
Values: n/a
Description: The attention code precedes all command lines except A/ and
the escape sequence.
Command: ENTER Key
Values: n/a
Description: Press the ENTER or RETURN key to execute most commands.
Command: A Answer
Values: n/a
Description: Answers an incoming call before the final ring.
Command: A/ Repeat Last Command
Values: n/a
Description: Repeats the last command string. Do not precede this com-
mand with AT. Do not press ENTER to execute.
Command: B
n
Communication Standard Setting
Values: n = 0 or 1
Default: 1
Description: B0 Selects ITU-T V.22 mode when the modem is at 300 or 1200 bps.
B1 Selects Bell 212A when the modem is at 300 or 1200 bps.
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: Dials telephone number s, where s may up to 40 characters
long and include the following dial string modifiers.
0–9Digits 0 through 9
*The “star” digit (tone dialing only)
#The “pound” digit (tone dialing only)
A–DA, B, C, and D tone digits. Country specific; some countries
may prohibit these digits.
LRedial last number. (Must be placed immediately after ATD.)
PSelect pulse-dialing until a T is encountered. Affects current
and subsequent dialing.
TSelect tone-dialing until a P is encountered. Affects current
and subsequent dialing.
WWait for a new dial tone before continuing to dial. (X2 or X4
must be selected.)
,Pause during dialing for time set in register S8.