DescroptionCompatible with KX-TDA 100D Panasonic Phone Systems Version 5Up to 5 Cards supported on Panasonic KX-TDE100 and Panasonic KX-TDE200 Phone Systems24 ports per card for Single Line Devices such as Single Line Phones, Fax Machines, Postal Meter, Credit Card Terminals, hotel/ motel phones, etcSupports Caller ID to Single Line TelephonesSupports Message Waiting Indicator Light on Single Line Devices6 ports are equipped with power failure transferEquipped with 16 DTMF receiversCard requires 1 free slot