US Robotics COURIER Manuel d'utilisateur Page 187

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U.S. Robotics I-modem Command Reference
Analog Synchronous Applications • Page 16-2
Requirements
You must have these before you start:
A Device with a Synchronous Serial Port
Find out what hardware and software you need before proceeding. You will probably have
to purchase and install a synchronous adapter card. These cards provide:
¥ A synchronous serial port.
¥ Support for one or more synchronous protocols.
¥ Additional software functions. For example, the card may tell the mainframe what type
of computer or terminal you are using. The card may also tell the mainframe what
resources you want to use.
A Serial Cable
Obtain a shielded serial cable with a male DB-25 connector on one end and a connector on
the other end that is appropriate for your synchronous serial port. The I-modem provides
an EIA-232 interface through its serial port.
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