The Panasonic KX-TDA6174 16-port single line telephone card supports single line telephones in which 4 ports are equipped with power failure transfer. The card is also compatible with 16 DTMF receivers. One card requires 1 free slot.
KX-TDA6174 PANASONIC
141.99 $
Panasonic KX-TDA6174 Single Line Extension Card (ESLC16)
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