Nortel NT9T6400 BCM 50 Expansion Cabinet (Refurbished)The Nortel BCM50 can be expanded through the connection of up to 2 external BCM 50 Expansion chassis. The expansion chassis are 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. More Information: Mnfr. Part #: NT9T6400 Each expansion unit can accomodate 1 media bay module The Nortel BCM 50 Expansion Cabinet requiers the BCM 50 Expansion Port