Appendix F BRIM wiring chart 215
BCM50 Installation and Maintenance 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 84). You can connect up to four BRI ISDN lines to the
BRIM.
Figure 84, Table 41, and Table 42 on page 216 apply to S-Loop and T-Loop connections. S-Loop
are used to connect S-Loop devices such as video phones, terminal adapters, and Grp 3 Fax
machines. The T-Loops are used to connect to the CO/PSTN.
Figure 84 BRIM RJ-45 ports
Table 41 and Table 42 on page 216 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 41 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
