Siemens S35i - Important Precautions; Usage Restrictions and Safety; Product Care and Warranty

Modem Command Set Reference Manual
page 3 of 7
1. AT Command Set
A command entered at the user port generally starts with a command prefix consisting of the characters ‘AT’.
The remainder of the line is interpreted as a sequence of the commands described below. The commands are not
case-sensitive. More than one command may be given on a single line.
With all commands in Table 1 that take a numeric argument this argument may be omitted and defaults to 0.
The ATD command is special: all characters in the same line (or up to a semicolon) are considered part of the
number to dial.
The prefix ‘A/’ repeats the preceding command.
Command Description
A/ Repeat the last command string.
+++ Escape sequence, switches to command mode during call
AT Prefix for all other commands
Command Function (default values in
bold type )
Implementation comments Reference
A Answer a call V.25 ter
B[n] Sets the bearer service for
data connections (cf.
+CBST).
Parameters:
DNT
7 2400 bps, asynchronous,
V.22bis
11 4800 bps, asynchronous,
V.32
13 9600 bps, asynchronous,
V.32
25 2400 bps, asynchronous,
V.110 ISDN
27 4800 bps, asynchronous,
V.110 ISDN
29 9600 bps asynchronous,
V.110 ISDN
99 Call: Automatic selection
of the operation mode
in accordance with the
baud rate of the PC.
Answer: All calls are
accepted.
Dx[;] Dial phone number x.
Some prefixes not defined in
V.25 ter are recognised:
V.25 ter, GSM
07.07
I ISDN: This phone call
will be made as a ‘UDI’