Wired Video Intercoms
Wired video intercoms
Most video monitors now connect to the entry panel by 2 wire. Cat5 cable is acceptable up to 50m, but a 2 core data cable should be used. The PSU and lock can use the same 2 core cable, though check the lock requirements for PSU.
Various finishes are available. Modular panels may have over 20 call buttons. Each 2 wire monitors wires to the entry panel. On 2 wire digital bus systems, all components (except lock) can be wired together.
Some systems are able to separate the camera from the panel, or have an extra panel. This can give a better or more relevant view of the caller.