Synxcom SM9234D, User Manual

Page: 39 / 216

AT Commands
Page 39
The following syntax is used for parameters that accept a single value:
+<name>=[<value>]
The following syntax is used for parameters that accept more than one value:
+<name>=[<compound_value>]
For each implemented parameter, if all mandatory values are specified, and all
values are valid according to the definition of the parameter, the specified values
are stored. If <name> is not recognized, one or more mandatory values are
omitted, or one or more values are of the wrong type or outside the permitted
range, the modem issues the ERROR result code and terminates processing of the
command line. An ERROR is also generated if too many values are specified. In
case of an error, all previous values of the parameter are unaffected.
Parameter Read Command Syntax
The DTE may determine the current value or values stored in a parameter by using
the following syntax:
+<name>?
The modem responds by sending the current values stored for the parameter to the
DTE in an information text response. The format of this response is described in
the definition of the parameter. Generally, the values are sent in the same form in
which they would be issued by the DTE in a parameter setting command; if
multiple values are supported, they will generally be separated by commas, as in a
parameter setting command.
Parameter Test Command Syntax
The DTE may test if a parameter is implemented in the modem, and determine the
supported values, by using the syntax:
+<name>=?
If the modem does not recognize the indicated name, it returns an ERROR result
code and terminates processing of the command line. If the modem does recognize
the parameter name, it returns an information text response to the DTE, followed
by an OK result code. The information text response indicates the values
supported by the modem for each such subparameter, and possibly additional
information. The format of this information text is defined for each parameter.