Command Reference Manual
100722A
Conexant
3-1
3. DATA COMMAND SET
3.1 COMMAND GUIDELINES
The commands used to control and report modem operation in data modem mode are defined in this section.
The Data Modem Mode commands and responses described in this section are applicable when command +FCLASS=0.
(See Section 3.2.1.2 for the definition of the FCLASS command.)
The default values are typical of a fully configured modem supporting all data rates and options. The actual default value is
dependent upon installed modem firmware and country specific parameters.
Commands are accepted by the modem once the previous command has been fully executed, which is normally indicated by
the return of an appropriate result code. Execution of commands D and A, either as a result of a direct command or a re-
execute command, will be aborted if another character is entered before completion of the handshake.
3.1.1 Escape Code Sequence
When the modem has established a connection and has entered on-line data mode, it is possible to break into the data
transmission in order to issue further commands to the modem in an on-line command mode. This is achieved by the DTE
sending to the modem a sequence of three ASCII characters specified by register S2. The default character is '+'. The
maximum time allowed between receipt of the last character of the three escape character sequence from the DTE and
sending of the OK result code to the DTE is controlled by the S12 register.
3.2 DATA COMMANDS
The modem will respond to the commands detailed below. Parameters applicable to each command are listed with the
command description. The defaults shown for each configuration command are those used in the Conexant factory profile 0.
3.2.1 Generic Modem Control
3.2.1.1 Z - Soft Reset and Restore Profile
This command causes the modem to perform a soft reset and restore (recall) the configuration profile. If no <value> is
specified, zero is assumed.
Syntax
Z<value>
Defined Values
<value> Decimal number corresponding to the selected profile.
0 Soft reset and restore stored profile 0.
1 Soft reset and restore stored profile 1.
Result Codes
OK <value> = 0 or 1.
ERROR Otherwise.
