Panasonic KX-TDA0173 SLC8 8-Port Analogue SLT Extension CardPanasonic 8 Port Extension Card Manufacturers part no. : KX TDA0173 These cards are used, but were working when removed from site. They have not been further tested. No further accessories or documentation is included. They are in excellent condition. Panasonic 8 Port SLC8 SLT Extension Card gives the Panasonic KX TDA or KX TDE 100, 200 or 600 Telephone Systems 8 ports for connection to standard telephones. Please note, we cannot supply any technical