3Com NBX 4-Port Analog Line Card – Certified Pre-Owned

The 3Com NBX Analog FXO Line Card (3C10114) terminates up to four loop-start PSTN telephone lines to the NBX system via four RJ-11 interfaces; includes built-in caller ID support (service must be purchased from a Telco/PTT) and built-in power failure transfer jack. Requires R4.1 or higher system software.