COMSPHERE 3000 Series Carrier
COM Port Connection ± External PC
Communication between the Model 3151 CSUs and Model 3161 DSU/CSUs in a 3000 Series Carrier and an external PC (attached either locally or through an external modem) occurs through a shared communication (COM) port. Since the Models 3151 and 3161 do not have their own COM port for external access, one unit in the carrier must be selected as the master communication port. This unit then provides the COM port for all Models 3151 and 3161 in the carrier.
Only one Model 3151 or 3161 unit in the carrier can be configured as the master communication unit. By using COM port configuration options for this unit, you can configure Port 2 on the Auxiliary Backplane as the COM port for the carrier. An attached PC can then access any unit in that carrier through the shared COM port on the master communication unit.
Figure 3-25 shows the COM port adapter you use on the Auxiliary Backplane to accomplish the COM port connection for the master communication unit.
Figure 3-25. COM Port Adapter
Figure 3-26 shows a PC attached to the Auxiliary Backplane using the COM port adapter and cable.
Figure 3-26. PC Attached to Auxiliary Backplane Using COM Port Adapter and Cable
December 1994 |
