The Panasonic KX-TDA5170 is a 4-port hybrid extension card (HLC4) with 4 ports per card. The card supports KX-T7700 (APT) series telephones, single line (SLT), DSS console, (KX-T0141) 2 port cell station and voice mail. The Panasonic KX-TDA5170 is expandable to maximum 1 card per system.
4 Station Hybrid Expansion Card
Add 4 Extensions / User Endpoints