Nortel Networks 400 4.0, BCM200 manual MSC faceplate optional connectors, Connectors Description

42Chapter 2 Introducing the BCM hardware

Figure 11 BCM400 MSC components

	Mounting
	screw
PEC III (4 slots)	holes
DS256 interface (connect
to MBM backplane DS30
connectors)
	PCI connector
Bracket press plate
DS256 (to expansion unit)
Auxiliary ringer	Lanclet tab
Page relay
Page output	Music-on-hold input

Table 7 MSC faceplate optional connectors

Connectors	Description
DS256 connector (BCM400)	The BCM expansion unit connects to the BCM main unit through the DS256 jack on
	the MSC faceplate. The DS256 cable to make this connection is provided with the
	purchase of a BCM expansion unit.
Auxiliary ringer jack	The BCM system uses the auxiliary ringer jack to control the cadence of an auxiliary
	ringer (customer supplied). You must use this output in a low current, low voltage
	application only. Do not use this output for switching the auxiliary ringer directly.
Page relay jack	When you use the page signal output jack to connect an external paging amplifier,
	you also use the page relay jack. The page relay jack connects a floating relay
	contact pair. The BCM system uses this jack to control the external paging amplifier.
Page output jack	The BCM system uses the page output to connect an internally generated voice
	paging signal to an external paging amplifier (customer supplied).
Music-on-hold jack	The BCM system uses the music-on-hold input to connect an external music source
	that supplies a signal to held lines (music-on-hold) or telephone speakers
	(background music). The input source can be any available radio or music source
	approved for connection to the network.

For directions on setting up these features, refer to “Installing optional telephony equipment” on page 173.

Warning: External equipment connected to the auxiliary ringer, page relay, page output, and music-on-hold interfaces must use safety extra low voltage (SELV). All four interfaces are (SELV) and the external equipment connected to these interfaces must be SELV. If these interfaces are not SELV, you must use external line isolation units (LIU).

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