Nortel Networks 400 4.0 manual Media services card MSC, BCM200 MSC components

Chapter 2 Introducing the BCM hardware 41

Table 6 Base function tray internal component descriptions

Component	Description
System status LEDs	The system status display LEDs indicate the current status of the hardware
	components (see “Base function tray system status display LEDs” on page 77).
DS256 interface	The DS256 interface connects to MBM backplane DS30 connectors.
PEC III slots	The PEC III slots provide connections for installing PECs.
Media services card (MSC)	The MSC performs call processing and media processing of the voice channels for
	the BCM system. See “Media services card (MSC)” on page 41.
MSC mounting screws	These screws are used to mount the MSC in the main unit.

Media services card (MSC)

The media services card (MSC) is a peripheral component interface (PCI) card that performs call processing and media processing of the voice channels for the BCM system, including VoIP trunks. The MSC also offers connections for auxiliary features, including external customer-supplied hardware for paging and music-on-hold.

Figure 10 shows the BCM200 MSC components. Figure 11 shows the BCM400 MSC components. Table 7 describes the MSC faceplate optional connectors.

Figure 10 BCM200 MSC components

PEC III (2 slots)

Mounting screw holes

DS256 interface (connect to MBM backplane DS30 connectors)

Bracket press plate

Auxiliary ringer

Page relay

Page output

Music-on-hold input

PCI connector

Lanclet tab

BCM200/400 4.0 Installation and Maintenance Guide