Table of Contents
Advertisement
3.1 COMMAND GUIDELINES
The commands used to control and report modem operation in data modem mode are
defined in this section. The default values are typical of a fully configured modem
supporting all data rates and options. The actual default value is dependent upon
modem software as defined by the Product Configuration File. Commands will only be
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.
3.1.1.1 +FCLASS=0- Select Data Modem Mode
+FCLASS=0 selects the Data Modem Mode. 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.)
Advertisement
Table of Contents
