Nortel BCM 50 Expansion Cabinet:

The Nortel BCM50 be expanded through the connection of up to 2 external BCM 50 Expansion chassis. The expansion chassis is connected to the BCM 50 using a simple RJ-45 CAT5 cable (provided) and uses its own, external power supply which is included with the expansion module. Each expansion unit can accomodate 1 media bay module.