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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
he DTE may determine the current value or values stored in a parameter by using the
T
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.
2.5 Issuing Commands
All characters in a command line must be issued at the same data rate, and with the
same parity and format. ???
The modem will ignore any command line that is not properly terminated. The modem
may consider 30 seconds of mark idle time between any two characters as an
improperly terminated command line. In this case the modem may or may not generate
an ERROR message. The modem will ignore any characters received from the DTE that
are not part of a properly-formatted command line.
If the maximum number of characters that the modem can accept in the body is
exceeded, an ERROR result code is generated after the command line is terminated.
The DTE will not begin issuing a subsequent command line until at least one-tenth of a
second has elapsed after receipt of the entire result code issued by the modem in
response to the preceding command line.
2.6 Executing Commands
Upon receipt of the termination character, the modem commences execution of the
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