CopperOptics 150-1619-11, Technical Practice, Page: 20 / 52

Overview 950-719-111-03, Revision 03
14 June 29, 2000 PCS-719 List 1A
Figure 5. Null Modem Connection for PCS-719 Backplane
LAN Interface
The COT shelf supports communications between multiple shelves by means of a 10Base2 BNC LAN connector.
This feature requires a PMU installed in the COT shelf. Refer to the PMU documentation for additional
information on this interface.
Figure 6 shows the 10Base2 LAN connector.
Figure 6. LAN Connector
DSX1 Connections
The COT shelf provides terminations for eight DS1 inputs from the DSX-1 cross-connect by way of wire-wrap
pins located at the bottom right hand side of the shelf backplane. The DS1 inputs are bridged to both PMX slots
to allow for 1:1 equipment protection. The 100
Ω
termination resistors are included on each of the DSX1 IN
connections.