3 set touch-tone detect time, 4 reset line interface board programming, 5 send software reset to all line interface boards – DoorKing 1820 Telephone Intercom User Manual
3 set touch-tone detect time, 4 reset line interface board programming, 5 send software reset to all line interface boards | DoorKing 1820 Telephone Intercom User Manual | Page 52 / 63
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