Nortel Networks BCM200, 400 4.0 manual Trunk media bay modules MBMs, Trunk MBMs Sheet 1

Chapter 2 Introducing the BCM hardware 53

Figure 26 MBM connectors (rear view)

Cooling fan

Signaling, media, and

power connector

Signaling, media, and

power connector

This section provides information on the following telephony MBMs:

•“Trunk media bay modules (MBMs)” on page 53

•“Station media bay modules (MBMs)” on page 56

•“Specialized media bay modules (MBMs)” on page 61

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	Connects digital public switched	Install in the BCM main unit only.
(see “Digital trunk media bay	telephone lines to the BCM system.	DTMs do not function if installed in the
		BCM expansion unit.
module” on page 54)
CTM4/CTM8	Connects a maximum of four (CTM4) or
(see “Caller ID trunk media bay	eight (CTM8) analog public switched
	telephone lines to the BCM system.
module” on page 55)

BCM200/400 4.0 Installation and Maintenance Guide