Sony Ericsson TT4031 (SE-GM29) - Manual (Page 56)

Owner’s Manual Rev 1.0 Page 56 of 56
< > The term enclosed in angle brackets is a syntactical
element. The brackets do not appear in the command
line.
[ ] Square brackets are used to indicate that a certain item
is optional. For example, sub-parameters of a command
or an optional part of a response. The brackets do not
appear in the command line.
Value The default values of the supported parameters are
indicated by using bold text when presenting the value.
Other characters, including ‘?’, ‘=’, parenthesis, etc., appear in commands
and responses as written.
The final result codes OK, ERROR, +CME ERROR: <err> and CMS
ERROR:<err> (see sections AT Response Syntax
are not listed under “Possible Responses” for each AT command.
OK and ERROR are listed if these are the only possible responses.
1.2.2 AT Command Syntax
The AT standard is a line-oriented command language. Each command is
made up of the following three elements:
the prefix;
the body;
the termination character.
The prefix consists of the letters “AT”, which are derived from the first two
letters of the word attention. The body is made up of the command, the
parameter, and if applicable the associated values.
Commands may be combined in the same command line. Spaces between
the individual bodies are ignored.
Basic Syntax Command
The format of basic syntax commands is as follows:
AT<command>[=][<parameter>]<OK>
Example!_ ATL=0<CR> (sets the volume of the speaker)
Additional commands may follow a command on the same command line
without any character being required for separation. For the command D
parameters, see the description for the command in question.