Panasonic KX-TDA0170 *** REFURBISHED*** 8-Port Digital Hybrid Extension Card DHLC8Good Condition8-Port Digital Hybrid Line Card (DHLC8)Supports T7600, T7400 (DPT), and T7700 (APT) series telephones, SLTs, DSS consoles, and cell stations T0141, T0158, and T01512 power failure transfer portsRequi..