Nortel Networks 400 4.0 Station media bay modules MBMs, Global analog trunk media bay module

56Chapter 2 Introducing the BCM hardware

Each BRI ISDN loop you connect adds two telephone lines to the BCM system. Therefore, each BRIM adds a maximum of eight lines to the BCM system through the four RJ-48C jacks on the faceplate. The LEDs beside each RJ-48C jack are on when the ISDN line is active. Figure 29 on page 56 shows the BRIM faceplate LEDs and connections.

Figure 29 BRIM faceplate

Global analog trunk media bay module

The global analog trunk media bay module (GATM) provides an interface for four or eight analog public switched telephone network (PSTN) lines. The GATM supports both pulse and tone dialing, as well as caller ID and disconnect supervision in selected markets throughout the world.

The GATM uses an RJ-21 connector as the trunk interface. Figure 30 shows the GATM faceplate LEDs and RJ-21 connector. The GATM is available either in four-port (GATM4) or eight-port (GATM8) configurations.

Figure 30 GATM faceplate

Station media bay modules (MBMs)

Station (MBM) connect telephones and analog telecommunication devices to the BCM system.

Table 9 lists the available station MBMs.

Table 9 Station MBMs (Sheet 1 of 2)

MBM	What it does	Special notes
DSM16(+)/DSM32(+)	Connects a maximum of 16 (DSM16+) or
(see “Digital station media bay module”	32 (DSM32+) digital telephones to the
	BCM system.
on page 57)
4x16	Connects a maximum of four analog
Combination of a CTM4 and a DSM16	public switched telephone lines to the
(see “4x16 media bay module” on page	BCM system.
	Also connects a maximum of 16 digital
58)
	telephones to the BCM system.

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