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Nortel Networks 400 4.0 User Manual

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Appendix B BRIM wiring chart
337
BCM200/400 4.0 Installation and Maintenance Guide
Appendix B
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 
). You can connect up to four BRI ISDN lines to the 
BRIM.
 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 190   BRIM RJ-45 ports
 lists 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 86   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