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AT Command Reference
80-99208-1 Rev. D 6-7
AT Commands Overview
Command Alphabet
The ASCII character set is the alphabet used for the AT
command set. Only the low order seven bits of each character
are considered significant.
Case Sensitivity
Although AT commands are specified in uppercase
throughout this Integrator’s Reference Manual, both
uppercase and lowercase are valid. The modem does not
distinguish between uppercase and lowercase letters.
Command Line Format
AT command lines are made up of three parts: the prefix, the
body, and the termination character.
The command line prefix consists of the letters
AT. The
command line prefix is followed by the body, which consists of
one or more AT commands. Command syntax for each specific
AT command within the body is as specified in this document,
for example,
E or $QCSTATUS.
Space characters can be used freely within the body for
formatting purposes. Command lines are terminated with the
termination character specified by S-register
S3 (see
Command Line Termination Character (S3) on page 6-25).
The default value of
S3 is the carriage return character <CR>
(ASCII value of 13 decimal).
You can use an alternate command line prefix, which causes
the previously entered command line (body and terminator)
to be executed. This command line prefix consists of the
letters
A/.
Note
No terminator is required after entering the / character to begin
command line execution.