Nortel BCM 3.5 Handbook - Digitcom

Basic Rate Interface Media Bay Module (BCM-BRIM S/T)
The BCM-BRIM S/T pluggable module connects up to four BRI S/T ISDN lines to the BCM
system. Each BRI S/T ISDN line that is connected adds two telephone lines to the BCM system.
Therefore, each BCM-BRIM S/T adds up to eight telephone lines to the system. BRI is often
delivered as a U interface by telcos in North America. An external NTI can be used to convert the
U interface to an S/T interface that is compatible with the BRIM S/T.
The front faceplate of the BCM-BRIM S/T has four RJ-48C connectors that connect the BCM-
BRIM S/T to the service provider’s connection point. On the left side of the RJ-48 connectors are
LEDs that show the status of the ISDN lines.
Each BCM-BRIM S/T also has two LEDs on the faceplate labeled as follows:
• Power (indicates working status)
• Status (indicates hardware status).
Figure 2-14
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