Parameter Set Command Syntax; Parameter Read Command Syntax; Parameter Test Command Syntax; Additional Syntax Rules - Conexant H08-15355F Reference Manual

respond with an ERROR result code, if the continued correct operation of the interface between the modem and DTE will not
be affected by such action. Read-only parameters may be read and tested.
"Read-write" parameters may be set by the DTE, to store a value or values for later use. Read-write parameters may be set,
read, and tested.
Parameters may take either a single value, or multiple (compound) values. Each value may be either numeric or string; the
definition of the parameter will specify the type of value for each subparameter. Attempting to store a string value in a numeric
parameter, or a numeric value in a string parameter, is an error.

2.4.4.2 Parameter Set Command Syntax

The definition of the parameter indicates, for each value, whether the specification of that value is mandatory or optional. For
optional values, the definition indicates the assumed (default) value if none is specified; the assumed value may be either a
previous value (i.e., the value of an omitted subparameter retains its previous value), or a fixed value (e.g., the value of an
omitted subparameter is assumed to be zero). Generally, the default value for numeric parameters is 0, and the default value
for string parameters is "" (empty string).
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.

2.4.4.3 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.

2.4.4.4 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.

2.4.5 Additional Syntax Rules

2.4.5.1 Concatenating Commands after Extended Syntax Commands

Additional commands may follow an extended-syntax command on the same command line if a semicolon (";") is inserted
after the preceding extended command as a separator. The semicolon is not necessary when the extended syntax command
is the last command on the command line.

2.4.5.2 Concatenating Commands after Basic Format Commands

Extended syntax commands may appear on the same command line after a basic syntax command without a separator, in
the same manner as concatenation of basic syntax commands.
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