XM1240S AT Commands Reference Manual
No. XM1240S-A00-106
xmodus swiss GmbH
6 / 46
2. SYNTAX AND PROCEDURES
The command and response syntax and procedures generally conform to referenced
recommendations and standards. Since these recommendations and standards
describe characteristics universal to a large installed base of modems to a maximum
degree, there may be syntax and procedural differences due to extensions and
behavioral differences in implemented commands, parameters, and responses
beyond that described in these recommendations and standards.
The syntax and procedures described in this section are based on V.25ter with
additional information included for implemented extensions and behavioral
differences beyond V.25ter.
2.1 ALPHABET
The T.50 International Alphabet 5 (IA5) is used in this document. Only the low-order
seven bits of each character are significant to the modem; any eight or higher-order
bit(s), if present, are ignored for the purpose of identifying commands and
parameters. Lower-case characters are considered identical for their upper-case
equivalents when received by the modem from the DTE. Result codes from the
modem are in upper-case.
2.2 DTE COMMAND LINES
Words enclosed in <angle brackets> are referenced to syntactical elements. The
brackets are not used when the words appear in a command line, the brackets are
not used. Words enclosed in [square brackets] represent optional items which may be
omitted from the command line at the specified point. The square brackets are not
used when the words appear in the command line. Other characters that appear in
syntax descriptions must as included as shown.
2.2.1 Command Line General Format
A command line is made up of three elements: the prefix, the body, and the
termination character.
The command line prefix consists of the characters “AT” or “at” or, to repeat the
execution of the previous command line, the characters “A/” or “a/”.
The body is made up of individual commands described in this document. Space
characters (IA52/0) are ignored and may be used freely for formatting purposes,
unless they are embedded in numeric or string constants. The termination character
may not appear in the body. The modem can accept at least 80 characters in the
body.
The termination character may not be selected by the user, the default is CR.
Example:
AT&FE0Q1S0=1S96=1<CR>
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