Synxcom SM9234D, Руководство пользователя

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AT Commands
Page 37
Action Commands
Action Execution Command Syntax
There are two general types of action commands: those that have associated sub
parameter values that affect only that invocation of the command, and those that
have no sub parameters.
If sub parameters are associated with a command, the definition of the action
command indicates, for each sub parameter, whether the specification of a value
for that sub parameter is mandatory or optional. For optional sub parameters, the
definition indicates the assumed (default) value for the sub parameter if no value is
specified for that sub parameter; the assumed value may be either a previous value
(i.e., the value of an omitted sub parameter remains the same as the previous
invocation of the same command, or is determined by a separate parameter or
other mechanism), or a fixed value (e.g., the value of an omitted sub parameter is
assumed to be zero). Generally, the default value for numeric subparameters is 0,
and the default value for string subparameters is "" (empty string).
The following syntax is used for actions that have no subparameters:
+<name>
The following syntax is used for actions that have one subparameter:
+<name>[=<value>]
The following syntax is used for actions that have two or more subparameters:
+<name>[=<compound_value>]
For actions that accept subparameters, if all subparameters are defined as being
optional, and the default values for all subparameters are satisfactory, the data
terminal equipment (DTE) may use the first syntax above (i.e., omit the "=" from
the action execution command as well as all of the subparameter value string).
If all other relevant criteria are met (e.g., the modem is in the proper state), the
command is executed with any indicated subparameters. If <name> is not
recognized, the modem issues the ERROR result code and terminates processing
of the command line. An ERROR is also generated if a subparameter is specified
for an action that does not accept subparameters, if too many subparameters are
specified, if a mandatory subparameter is not specified, if a value is specified of the
wrong type, or if a value is specified that is not within the supported range.