Digital Bridge User's Guide

Telenetics 2185
1-4
• When operating with control signal contention, the 2185 is trans-
parent to the data stream.
• When operating with data contention, subchannel data must be
mark idle and 16 consecutive marks cannot appear in mid-mes-
sage. The minimum data rate for an external clock is 50 bps.
Port-Sharing Mode
In the port-sharing mode, the 2185's main channel is connected directly
to a CPU or controller port (DTE). Subchannel devices communicate
with the 2185 via modem links. Figure 1-1 shows a typical port-sharing
application.
Figure 1-1. Port-Sharing Application