Read Panasonic KX-TDA1180X (serv.man3) Service Manual online
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KX-TDA1180X
4.3.11. Power Failure Port
At the time of the power failure, for enabling a direct call to the extension phone, 2 lines out of 8 lines can be connected to the
SLT port, which provides a switching relay for power failure on the extension card, by a cable. Connecting CN3 with the connec-
tor for power failure on the extension card can call at the power failure.
SLT port, which provides a switching relay for power failure on the extension card, by a cable. Connecting CN3 with the connec-
tor for power failure on the extension card can call at the power failure.
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