Video Door Phone User Manual
6
● On the rear panel of the indoor station, four-wire interface A and four-wire interface C
compose a cascading group; and four-wire interface B and four-wire interface C compose a
cascading group.
● The communication between A and B/D cannot be realized.
● The communication between C and B/D cannot be realized.
Caution
Do not connect the power wire of the four-core cable to the V pin (video wire) or A pin (audio
wire) of the four-wire interface.
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