Synxcom SM9234D, User Manual

Page: 47 / 216

AT Commands
Page 47
Data Command Set
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.
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.
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.
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.
Generic Modem Control
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.