| 摘要 |
The invention provides a method of enhancing security in a remotely monitored alarm system in which an alarm communicator (10) communicates alarms signals to a monitoring centre (20), the method comprising the steps of: decoding signals (103) over a communication channel between the alarm communicator (10) and the monitoring centre (20), according to a communications protocol; analysing (103) the decoded signals for an invalid communication event (104); and taking remedial action if an invalid communication event (104) is detected. SET INITIAL COMMUNICATIONS SIGNAL ATTEMPT? OPEN SECOND 1 04 COMMUNICATION VALID CHANNEL N COMMUNICATION EVENT? |
