Nortel Networks BCM50 - Manual (Page 39)

Chapter 2 Introducing the BCM50 hardware 39
Installation and Maintenance Guide
To connect an MBM to the BCM50 2.0 system, you must install the MBM in the expansion unit,
and then connect the expansion unit to the main unit. See
Installing an expansion unit on page 93
for more information about installing an expansion unit.
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
Expansion unit and expansion connectors
on page 39. 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
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.
Retention clip mounting hole A small hole into which you insert the retention clip. The retention clip secures the
power connector to the expansion unit.
Expansion port An RJ-45 jack used to connect the expansion unit to the main unit.
Ejector The ejector is used to remove the media bay module from the expansion unit.
MBM bay A slot into which you install an MBM.
Warning: Make sure you disconnect the power supply to the expansion unit
before inserting or removing an MBM.
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.
Table 2 BCM50 expansion unit ports, connectors, and descriptions (Sheet 2 of 2)
Port/connector Description
Expansion unit 1 Main unit Expansion unit 2
Buses 7/8 Buses 5/6