Panasonic KX-TD50175
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KX-TDA50175. 16 port analog Extension. The KX-TD50175 card allows the connection of single line telephones with the ability to light message lamps and is typically used in hotel / motel applications. Works with the KX-T500 Digital Phone System. This enlarged single line station card is equipped with message waiting, 16 ports, and ports 1-8 are power failure transferable.