Nortel Networks 400 4.0 Manual De Usuario

Chapter 2 Introducing the BCM hardware

BCM200/400 4.0 Installation and Maintenance Guide

There are two Caller ID trunk media bay modules (CTM):

•

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 MBM faceplate. These jacks are labeled Line 1, 
Auxiliary, Line 2, Line 3, and Line 4. The auxiliary jack connects to Line 1.

•

CTM8
The CTM8 provides eight analog CLID interfaces to the BCM system through eight RJ-11 
jacks on the MBM faceplate. Each jack also supports disconnect supervision. There are two 
auxiliary jacks on this MBM which connect to Line 1 and Line 5.

The auxiliary ports enable you to connect to a V.92 or V.90 modem, fax machine, or analog 
telephone. When the auxiliary device is active, the BCM system disables the associated line. 
Conversely, when the line is active, the auxiliary port line is disabled. When you connect an 
analog telephone to the auxiliary port, you can use it as an emergency telephone because this line 
remains active during a power outage. 

 shows the front of the CTM4 and CTM8.

Figure 28   CTM4 and CTM8 module faceplate LEDS and connectors

The basic rate interface media bay module (BRIM) connects a maximum of four BRI ISDN loops 
to the BCM system. The BRIM only recognizes the T-interface used in European networks. To use 
the BRIM with the U-interface, typical in North American networks, you require an external NT1 
box to convert the U-interface to a T-interface.

Tip: You can install a maximum of three DTM modules in the BCM main unit, depending 
on the available buses.

Power LED
Status LED
Line 1
Aux
Line 2
Line 3
Line 4

Line 1
Auxiliary port

Auxiliary port
Line 5