Nortel BCM 4 Port Trunk Media Bay Module w/Caller ID (NT5B18AAAD) Refurbished

Nortel BCM CTM4 4-Port Caller ID Analog Trunk Media Bay Module. The Nortel BCM CTM4 is compatible with the BCM 200/400 Main Unit, BCM 400 Expansion Unit, BCM 450 Main Unit, BCM 450 Expansion Unit and BCM 50 Expansion Unit.