Bcm50 expansion unit and media bay modules – Nortel Networks BCM50 User Manual
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Chapter 2 Introducing the BCM50 hardware
NN40020-302
BCM50 Expansion unit and media bay modules
In addition to a main unit, the BCM50 2.0 system can have up to two BCM50 expansion units. An
expansion unit connects to the main unit and provides additional functionality. For expansion unit
port locations and descriptions, see the figure
BCM50 expansion unit connections
BCM50 expansion unit ports, connectors, and descriptions
The BCM50 expansion unit accommodates one media bay module (MBM) that connects
additional telephony equipment to the BCM50 2.0 system. The MBMs connect with external
devices to implement various types of voice trunks and stations. For a list of trunk and station
MBMs that can be used with your BCM50 2.0 system, see the table
on page 41 and
on page 43. For a complete list of MBMs with links to additional
information, see also the table
Ensure that the MBM dip switches are set correctly (see
Verifying the media bay module switch
Figure 7 BCM50 expansion unit connections
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).
Table 2 BCM50 expansion unit ports, connectors, and descriptions (Sheet 1 of 2)
Port/connector
Description
LAN port (port 1)
An RJ-45 jack used to connect the customer LAN to the main unit.
The LAN port on the expansion unit connects to the internal Ethernet switch on the
main unit. You can use the expansion unit LAN port to connect an additional device to
the LAN.
Power connector
A barrel connector jack used to connect the power supply to the expansion unit.
Ejector
Expansion
port
Power
LAN port
MBM bay
Retention clip
mounting hole