Nortel BCM50 2.0, Installation Manual

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Appendix F BRIM wiring chart 73
Telephony Device Installation Guide
Appendix F
BRIM wiring chart
The digital BRI ISDN lines are connected to the BRIM through the RJ-45 jacks on the front of the
media bay module (MBM) (see
Figure 18 ). You can connect up to four BRI ISDN lines to the
BRIM.
Figure 18 , Table 14 , and Table 15 apply to S-Loop and T-Loop connections. S-Loop connections
are used to connect S-Loop devices, such as video phones, terminal adapters, and group 3 fax
machines. The T-Loop connections are used to connect to the CO/PSTN.
Figure 18 BRIM RJ-45 ports
Table 14 and Table 15 list the wiring details for the RJ-45 ports.
Warning: For a U-Loop connection, the BRIM must be connected only to an NT1
provided by the service provider. The NT1 must provide a Telecommunication Network
Voltage (TNV) to Safety Extra Low Voltage (SELV) barrier.
Table 14 BRIM RJ-45 port wiring
Pin Signal Signal on system side
1 No connection No connection
2 No connection No connection
3 + Receive (+Rx) +Tx
4 + Transmit (+Tx) +Rx
5 - Transmit (-Tx) -Rx
6 - Receive (-Rx) -Tx
7 No connection No connection
8 No connection No connection
1 2 3 4 5 6 7 8
RJ-45 pin-out
RJ-45 jacks
BRIM