AT Command Set
MC35_ATC_01_V04.00 Page 13 of 238 02.04.2002
1.5.1 Using parameters
• Default parameters are underlined throughout this document.
• Optional parameters are enclosed in square brackets. If optional param eters are omitted, the cur-
rent settings are used until you change them.
• Optional parameters or subparamters can be omitted unless they are follo wed by other parame-
ters. If you want to omit a parameter in the middle of a string it must be repl aced by a comma. Ex-
ample:
AT+CPBW=,<number>,<type>,<text> writes a phonebook entry to th e first free memory location.
AT+CPBW=<index>,<number>,<type>,<text> writes a phonebo ok entry to the memory location
specified by <index>.
• When the parameter is a character string, e.g. <text> or <number>, th e string must be enclosed in
quotation marks, e.g. "Charlie Brown" or "+49030xxxx". Symbols within quotation marks will be
recognized as strings.
• All spaces will be ignored when using strings without quotaton mark s.
• It is possible to omit the leading zeros of strings which represent num bers.
• In case of using V.25ter commands without giving an optional param eter, its value is assumed to
be 0.
1.5.2 Combining AT commands on the same command line
You may enter several AT commands on the same line. This eliminates the need to t ype the "AT" or
"at" prefix before each command. Instead, it is only needed once at the beginning of the command
line. Use a semicolon as command delimiter.
The command line buffer accepts a maximum of 391 characters. If this number is excee ded none of
the commands will be executed and TA returns ERROR.
The table below lists the AT commands you cannot enter together with other commands on the same
line. Otherwise, the responses may not be in the expected order.
Table 4: Illegal combinations of AT commands
V.25ter commands With FAX commands, Prefix AT+F
GSM 7.07 commands With Siemens commands, Prefix AT^S
GSM 7.05 commands (SMS) --- To be used standalone
Commands starting with AT& --- To be used standalone
AT+IPR --- To be used standalone
Note: When concatenating AT commands please keep in mind that the seq uence of processing may
be different from the sequential order of command input. Therefore, if the c onsecutive order of
the issued commands is your concern, avoid concatenating comm ands on the same line.
1.5.3 Entering successive AT commands on separate lines
When you enter a series of AT commands on separate lines, leave a paus e between the preceding
and the following command until OK appears. This avoids sending too many AT commands at a time
without waiting for a response for each.