You can use it without a phone hook up. So you will just have an alarm system that makes a noise.
You may like to consider a Cellular connection, that requires a SIM card, that could send text messages to your mobile should the alarm be activated. But does not really help if you are in a meeting or have your mobile turned off. Active monitoring is the best. Another alternative is to have a radio fitted and that would be monitored by a security service/police station.
Guy, January 2009
