Nortel Networks BCM1000 - Manual (Page 76)

76 Chapter 1 Introducing the Business Communications Manager
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Media Services Card
The Media Services Card (MSC), a PCI card, performs call processing and media processing of
the voice channels for the Business Communications Manager system, including the VoIP trunks
and IP-based telephones. This card also offers connections for auxiliary features, including
external, customer-supplied hardware for paging and music-on-hold.
Figure 19 shows the location of the MSC on the BCM1000.
Figure 19 MSC optional equipment ports
The MSC faceplate offers the following optional connections.
• DS256 connector— The BCM1000e connects to the BCM1000 base unit through the DS256
jack on the MSC faceplate.
The DS256 cable to make this connection is provided with the purchase of a Business
Communications Manager e1000.
• Auxiliary ringer jack — The BCM1000 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 BCM1000 uses this jack to control the external paging amplifier.
• Page output jack — The BCM1000 uses the page output to connect an internally-generated
voice paging signal to an external paging amplifier (customer supplied).
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).
Music on hold input
Page output
Page relay
Auxiliary ringer
MSC faceplate details
DS256 jack
BCM1000