3.2 Communication Controller Options
The following types of communication controllers are available for your system.
• Asynchronous serial controllers (with or without modem support)
• Synchronous serial controllers (with or without modem support)
• Network controllers
3.2.1 Asynchronous Serial Controllers
The following asynchronous controllers are available for your system, with or
without modem support.
• CXA16—16-line multiplexer, Q–bus controller
• CXB16—16-line multiplexer
• CXY08—8-line multiplexer with modem control, Q–bus controller
• DFA01—2-line controller with integral modems, Q–bus controller
• Digital terminal server
3.2.1.1 Asynchronous Controllers Without Modem Support
Before using any peripheral device connected to a serial communication
controller:
1. Make sure the device is properly connected to your system.
2. Make sure the device is properly installed, plugged into an appropriate power
source, and turned on.
3. Make sure the device is properly set up.
Setup involves choosing how the device operates. Some setups are matters
of personal choice; for example, the number of columns that display on
a terminal screen. Others, like baud rate (the speed at which data is
transmitted over a data line), must match your system setting if the device
and system are to communicate. Refer to your terminal or printer manual for
complete setup instructions. Generally, the default settings for your terminal
are acceptable.
Your operating system may have other requirements for using serial communica-
tion devices. Refer to your system software manuals.
3–36 Operating the System Options
