Nortel Networks BCM200/400 - Manual (Page 55)

Chapter 2 Introducing the BCM hardware 55
BCM200/400 4.0 Installation and Maintenance Guide
Figure 26 MBM connectors (rear view)
This section provides information on the following telephony MBMs:
• “Trunk media bay modules (MBMs)” on page 55
• “Station media bay modules (MBMs)” on page 59
• “Specialized media bay modules (MBMs)” on page 64
Trunk media bay modules (MBMs)
You install the trunk MBMs in the BCM main unit or the BCM expansion unit. Trunk MBMs
connect telecommunications lines to the BCM system.
The type of MBM you install is determined by:
• which lines are available from your telephone service provider
• what lines you require for the types of telephones you want to use
• budget considerations
Table 8 lists the types of trunk MBMs that are available for the BCM system.
Table 8 Trunk MBMs (Sheet 1 of 2)
MBM What it does Special notes
DTM
(see “Digital trunk media bay
module” on page 56 )
Connects digital public switched
telephone lines to the BCM system. Install in the BCM main unit only.
DTMs do not function if installed in the
BCM expansion unit.
CTM4/CTM8
(see “Caller ID trunk media bay
module” on page 57 )
Connects a maximum of four (CTM4) or
eight (CTM8) analog public switched
telephone lines to the BCM system.
Signaling, media, and
power connector
Signaling, media, and
power connector
Cooling fan