Nortel BCM50 3.0 Installation And Maintenance Manual page 43

Table 2 BCM50 expansion unit ports, connectors, and descriptions (Sheet 2 of 2)
Port/connector
Retention clip mounting hole
Expansion port
Ejector
MBM bay
To connect an MBM to the BCM50 system, you must install the MBM in the expansion unit, and
then connect the expansion unit to the main unit. See
more information about installing an expansion unit.
Warning: Make sure you disconnect the power supply to the expansion unit
before inserting or removing an MBM.
The supplied Ethernet cable (shielded) connects the expansion port on the expansion unit to one of
the two expansion ports on the main unit. See the figure
on page 43. Expansion unit 1 maps to buses 5/6 (port2), while expansion unit 2 maps to buses 7/8
(port 3).
Figure 8 Expansion unit and expansion connectors
Expansion unit 1
The LAN port on the expansion unit is connected 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.
Note: When you plug an expansion unit into the correct port on the main unit, the
LEDs on the expansion unit port light, while the LEDs on the main unit port turn
off.
Description
A small hole into which you insert the retention clip. The retention clip secures the
power connector to the expansion unit.
An RJ-45 jack used to connect the expansion unit to the main unit.
The ejector is used to remove the media bay module from the expansion unit.
A slot into which you install an MBM.
Main unit
Buses 7/8
Buses 5/6
Chapter 2 Introducing the BCM50 hardware
Installing an expansion unit
Expansion unit and expansion connectors
Expansion unit 2
Installation and Maintenance Guide
43
on page 95 for