Nortel Networks BCM200/400 - Manual (Page 33)

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BCM200/400 4.0 Installation and Maintenance Guide
Chapter 2
Introducing the BCM hardware
The Nortel Business Communications Manager (BCM) system provides private network and
telephony management capability to small and medium-sized businesses. The BCM system
integrates voice and data capabilities, voice over Internet protocol (VoIP) gateway functions, and
quality of service (QoS) data-routing features into a single telephony system. The BCM system is
a compact system that enables you to create and provide telephony applications for use in a
business environment.
Refer to the following sections for information on the BCM hardware components:
• “Main units”
• “BCM400 advanced function tray” on page 39
• “Base function tray component hardware” on page 41
• “BCM expansion unit (BCM400 only)” on page 51
• “MBM bays and backplane” on page 52
• “Media bay modules (MBMs)” on page 53
• “BCM400 expansion gateway” on page 65
• “BCM components” on page 66
• “Field replaceable units (FRU)” on page 72
• “Telephones and adapters” on page 75
Main units
The primary hardware component in the BCM system is the main unit:
• BCM200 main unit (see “BCM200 main unit” )
• BCM400 main unit (see “BCM400 main unit” on page 36 )
Note: Some of the components described in this document are not available in all areas.
Ask your Nortel sales agent for information about availability.
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).