| 摘要 |
An access control apparatus (10) comprising a locking means (22) operatively connected to, and controlled by an output signal of a mobile telephony transceiver (12), the mobile telephony transceiver being uniquely identifiable on a mobile telephony network (14), such as via a subscriber identity module (SIM card). A mobile telephony connection is provided between the transceiver and a remote control centre (16); the remote control centre being adapted to transmit, and the mobile telephony transceiver (12) being configured to receive, via the mobile telephony network, lock and unlock commands, such that upon receipt of a lock or unlock command, the mobile telephony transceiver is configured to output the output signal to lock or unlock, respectively, the locking means. The mobile telephony transceiver is number-locked such that it can only communicate with one or more pre-designated telephone numbers of the remote control centre via the mobile telephony network. A look-up table of pre-designated telephone numbers can be used to check an incoming communication and call-barring is provided to communications from telephone numbers not in the look-up table. The access control apparatus can be used in a manlid or cover for a manhole and have sensors to detect intrusion events or tampering. |
