| 摘要 |
In large installations, for example factories, offices or hotels, security systems are needed. Disclosed herein is a security system which can be easily monitored and controlled. The system includes a central controller connected to a plurality of send/receive unit (1/1), each unit being associated with a lock. Each lock is opened by receipt of a suitable signal from its associated send/receive unit (1/1) which is, in turn, controlled by the central controller. |
