User`s manual

U.S. Robotics I-modem Command Reference
Analog Synchronous Applications • Page 16-13
Commands and Result Codes NOT Supported
Synchronous Dialing Using AT Commands
To use AT commands to dial, you must set the I-modem to enter online synchronous mode
when you dial. You then dial the remote deviceÕs number using AT commands. Once the
remote device answers, the I-modem switches to synchronous mode and starts sending
synchronous
timing signals to your computer.
Because the I-modem will not accept commands when it is in synchronous mode, you
must conÞgure it in asynchronous
mode before trying to connect to a synchronous net-
work.
The I-modem always generates the Transmit clock-timing signals when in synchronous
mode.
CRI Call request with identiÞcation number
PRI Program identiÞer
RLD List of delayed call numbers
RLI Request list of identiÞcation numbers