video intercom system

7.       Inter-call between monitor and monitor.

6.       Built-in or extended image/voice/video recording and playing back;

5.       Remote lock release;

4.       Extra camera connection to each monitor;

3.       Watch door entrance;

2.       Audio/video communication ,video can be either B/W or Color;

1.       Door bell;

PBX system is a video intercom system, audio goes through PB (A) X switch, and with monitor with internal telephone function. In