Cusam Coding Intercom User Manual page 21

5. 5. 5. The wire that from the power source to the door station and door
station to locks, the section area of which should be bigger than 0.5mm
and the length have to be less than 15M, otherwise should enlarge the area
of wire
★the possible problems if the wiring does not conform to the request ：
1 1 1 . If the section area of
cause the indoor phones don't work when it is picked up or hanged off,can't
unlock the gate,or the low volume of indoor phones and things like that.I
2 2 2 . The section area of the wire that from power to door station and
door station to electronic lock is too slim.then it may cause the indoor
phone can't unlock the door.
★the wiring request of visible partial
Visible partially has two electric wires, one is for the surveillance
requests (M),
coaxial cable system uses SYV75-3, and should pay attention that the outer
layer shield cann't use as the wire to supply power, otherwise it possibly
causes the power source and undulation interfering picture
mian line or branch line is too slim, it may
the other is for the video coaxial cable (vi). The video
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