BCM50 Hardware & Installation
24 NN40011-002 Issue 1.2 BCM50 Rls 6.0
Media Bay Module Descriptions
The following sections describe the hardware attributes and functionality of
the Media Bay Modules.
Digital Trunk Module
When configured on a North American BCM system, the DTM connects a T1
or PRI circuit to the BCM system; T1 circuits provide 24 digital channels to the
PSTN, while PRI circuits provide 23 digital channels to the PSTN.
When configured on an International BCM system, the DTM connects an ETSI
ISDN (E1) or PRI (E1) circuit to the BCM system, providing a maximum of 30
digital channels to the PSTN.
Caller ID Trunk Module
There are two types of Caller ID trunk media bay modules (CTM):
1. CTM4:
The CTM4 connects a maximum of four analog calling line ID (CLID)
interfaces to the BCM system through four RJ-11 jacks on the front
faceplate of the MBM. These jacks are labelled Line 1,Auxiliary, Line
2, Line 3, and Line 4. The auxiliary jack connects to Line 1.
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