Rainbow Electronics GM862-QUAD-PY - Manual (Page 8)

AT Commands Reference Guide
80000ST10025a Rev. 5 - 09/07/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 8 of 434
3 AT COMMANDS
The Telit wireless module family can be driven via the serial interface using the standard AT
commands
1 . The Telit wireless module family is compliant with:
1. Hayes standard AT command set, in order to maintain the compatibility with existing SW
programs.
2. ETSI GSM 07.07 specific AT command and GPRS specific commands.
3. ETSI GSM 07.05 specific AT commands for SMS (Short Message Service) and CBS (Cell
Broadcast Service)
4. FAX Class 1 compatible commands
Moreover Telit wireless module family supports also Telit proprietary AT commands for special
purposes.
In the following is described how to use the AT commands with the Telit wireless module family.
3.1 Definitions
The following syntactical definitions apply:
<CR> Carriage return character, is the command line and result code terminator character, which
value, in decimal ASCII between 0 and 255,is specified within parameter S3. The default value
is 13.
<LF> Linefeed character, is the character recognised as line feed character. Its value, in decimal
ASCII between 0 and 255, is specified within parameter S4. The default value is 10. The line
feed character is output after carriage return character if verbose result codes are used (V1
option used ) otherwise, if numeric format result codes are used (V0 option used) it will not
appear in the result codes.
<...> Name enclosed in angle brackets is a syntactical element. They do not appear in the command
line.
[...] Optional subparameter of a command or an optional part of TA information response is
enclosed in square brackets. Brackets themselves do not appear in the command line. When
subparameter is not given in AT commands which have a Read command, new value equals
to its previous value. In AT commands which do not store the values of any of their
subparameters, and so have not a Read command, which are called action type commands,
action should be done on the basis of the recommended default setting of the subparameter.
1 The AT is an ATTENTION command and is used as a prefix to other parameters in a string. The AT command
combined with other parameters can be set up in the communications package or typed in manually as a
command line instruction.