User`s manual

U.S. Robotics I-modem Command Reference
Analog Synchronous Applications • Page 16-1
Chapter 16
Analog Synchronous Applications
This chapter applies to situations in which you want the I-modem to work with devices,
such as mainframe computers, that communicate using analog, synchronous
protocols.
The I-modem must be connected to a synchronous serial port.
Note These procedures do not apply to synchronous PPP calls.
There are two ways to operate the I-modem in analog synchronous mode:
¥ Dial Using V.25bis Software. ConÞgure the I-modem to enter synchronous mode when
you power it on. Then run communications software that uses the V.25bis protocol
to
control the dialing process.
¥ Dial Using AT Commands. ConÞgure the I-modem to dial out using AT commands and
then switch to synchronous mode once a connection is made.