Nortel BCM200 Installation And Maintenance Manual page 55

Figure 27 DTM faceplate
Tip: You can install a maximum of three DTM modules in the BCM main unit, depending
on the available buses.
Caller ID trunk media bay module
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.
Figure 28 shows the front of the CTM4 and CTM8.
Chapter 2 Introducing the BCM hardware
Monitor jacks RJ-48C digital
telephone line
connector
BCM200/400 4.0 Installation and Maintenance Guide
55