Firstly, the infrared alarm probes and monitoring probes in the dormitory and the factory are connected to the network alarm host and the network hard disk video recorder respectively, and switches are installed at appropriate positions less than 100 meters away from the dormitory and the factory. The network cable is connected to the network alarm host, the network hard disk video recorder and the optical fiber transceiver respectively. One optical fiber is laid to the guard of the head office, and the network of the other optical fiber transceiver is connected to the management computer at the guard.
In this way, the monitoring and infrared alarm of dormitory, factory and head office are managed by the doorman of the head office, and some more advanced functions can be realized through some settings, such as monitoring and alarm linkage.