NEC NEC-14T PADAIC Port Interface Module Circuit Card M-677109 PBX

NEC NEC-14T PADAIC Port Interface Module Circuit Card M-677109 PBX

The NEC NEC-14T is a PADAIC (Port Analog Digital Adapter Interface Circuit) port interface module circuit card designed for use in NEC PBX telephone switching systems. The card provides port interface functionality within the NEC switching architecture, handling the interface logic between analog/digital port circuits and the PBX backplane. It carries the internal part number M-677109 and is marked as manufactured in Japan.

Specifications & What's Included

• Manufacturer: NEC
• Model: NEC-14T
• Part Number: M-677109
• Country of Manufacture: Japan
• Form Factor: Card / Module (PCB with card-edge connector and retaining clip)
• DIP Switches: Three 8-position DIP switches (SW1, SW2, SW3) with OFF and MCC positions
• Logic ICs: Motorola MC74HC244AN octal buffer/line driver ICs (multiple, visible on PCB)
• Card retaining / ejector clip: present and intact
• Backplane interface: card-edge connector along bottom edge
• Included: circuit card only; no cables or accessories

Applications

Port interface cards like the NEC-14T are expansion and interface modules used inside NEC PBX telephone switching systems. NEC produced a broad range of PBX platforms from the 1980s through the 2000s — including the NEC NEAX and similar systems — and these cards populated the system's card cage to provide and extend port capacity. Each card handles the interface logic for a defined set of telephone ports, connecting physical lines or trunks to the PBX switching fabric. Cards of this type are typically sought by organizations maintaining or expanding legacy NEC PBX installations, or by technicians performing board-level repairs. The DIP switches on this card (SW1–SW3) are used for configuration addressing within the PBX chassis slot assignments.