Nortel Networks BCM50 - Manual (Page 213)

Appendix E Expansion ports wiring chart 213
Installation and Maintenance Guide
Appendix E
Expansion ports wiring chart
Two of the four RJ-45 connectors on the BCM50, BCM50a, BCM50e, BCM50b, BCM50ba, and
BCM50be main units are designated as expansion ports. See the figure
Expansion ports on a
BCM50 and an expansion unit on page 213. These ports connect to an expansion unit or connect
network devices to the LAN.
Figure 91 Expansion ports on a BCM50 and an expansion unit
The table Expansion port wiring on page 213 lists the wiring details for the expansion ports.
Table 40 Expansion port wiring (Sheet 1 of 2)
Pin Signal
1 + Ethernet Receive Data
2 – Ethernet Receive Data
3 + Ethernet Transmit Data
4 – FS256 Transmit Data
5 + FS256 Transmit Data
6 – Ethernet Transmit Data
BCM50 main unit
Expansion port
pin out
Expansion/LAN
(port 2) Expansion/LAN
(port 3)
Expansion unit
Expansion port