Panasonic KX-TDA1178 24-port single line EX card. This Panasonic KX-TDA1178 EX card features 24 ports per card for single line devices such as single line phones, fax machines, postal meter, credit card terminals, hotel/ motel phones; supports caller ID to single line telephones, supports message waiting indicator light on single line devices, 6 ports are equipped with power failure transfer, equipped with 16 DTMF receivers etc.