ROHS SM812CH-MV3(T) Installation And Operation Manual page 6

Connection for SM385CH
Notice: The ports in the dashed line box exist only in the indoor
monitor with (T) in the back of the model number. When the system
connects to main and slave monitors, analog outdoor station with 4+2
wire should be connected in parallel with each indoor monitor.
-7-
Network cable
Red
Doorbell
Black
Connection for SM328/812CH
White
video for second
confirmed White
Red
Black
second confirmed
outdoor station Brown
Blue
Notice: The ports in the dashed line box exist only in the indoor
monitor with (T) in the back of the model number. When the system
connects to main and slave monitors, analog outdoor station with 4+2
wire should be connected in parallel with each indoor monitor.
Red
Doorbell
Black
Red
Power
Black
-8-