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Appendix D Expansion ports wiring chart 211
BCM50 Installation and Maintenance Guide
Appendix D
Expansion ports wiring chart
Two of the four RJ-45 connectors on the BCM50, the BCM50a, and the BCM50e are designated
as Expansion ports (see Figure 82). These ports are used to connect to a expansion unit or to
connect network devices to the LAN.
Figure 82 Expansion ports on a BCM50 and an expansion unit
Table 38 lists the wiring details for the expansion ports.
Table 38 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
Expansion port
pin out
Expansion/LAN
(port 2)
Expansion/LAN
(port 3)
Expansion unit
Expansion port