At Command Syntax; Command Line - Nokia 8850 Command List

At command set
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AT Command Set for Nokia 8850
4

AT Command Syntax

Note that the "AT" or "at" prefix must be included at the beginning of each command
line. You may type several AT commands on the same line, and in such cases you
need to type the "AT" or "at" prefix only at the beginning of the command line.
The marking <n> used in a command syntax is the setting value typed in as a part of
the command. If the value is optional it is enclosed into square brackets. When you
select a setting value with an AT command, the setting is valid until you change it.
Some AT commands are not supported by all Nokia's products. Giving a command
which is not supported causes an error response. Also, some parameters may not be
supported by all products, and in this case those parameters are just ignored in
commands or left blank in responses.

Command Line

See figure below for general structure of a command line.
Basic structure of a command line
(ETSI, GSM 07.07 version 5.4.0, chapter 4.1.)
Standardized basic commands are found only in V.25ter. GSM commands use
syntax rules of extended commands. Every extended command has a test command
(=?) to test the existence of the command and to give information about the type of
its subparameters. Parameter type commands also have a read command (?) to
check the current values of subparameters. Action type commands do not store the
values of any of their possible subparameters, and therefore do not have a read
command.
If verbose responses are enabled with command V1 (see page 52) and all
commands in a command line has been performed successfully, result code
<CR><LF>OK<CR><LF> is sent from the TA to the TE. If numeric responses are
enabled with command V0 (see page 52), result code 0<CR> is sent instead.
If verbose responses are enabled with command V1 and subparameter values of a
command are not accepted by the TA (or command itself is invalid, or command
cannot be performed for some reason), result code <CR><LF>ERROR<CR><LF> is
sent to the TE and no subsequent commands in the command line are processed. If
numeric responses are enabled with command V0, result code 4<CR> is sent
instead. ERROR (or 4) response may be replaced by +CME ERROR: <err> or +CMS
ERROR: <err> when the command was not processed due to an error related to ME
or network operation.
Copyright © 2000. Nokia Mobile Phones. All rights reserved.

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