The GJD PSTN Autodialler makes use of a standard telephone line to call pre-programmed telephone numbers to warn of an intrusion. If an intruder is detected, the Autodialler automatically sends a call to any pre-programmed telephone number, providing a fast reliable warning and ensuring total peace of mind. The Autodialler will connect to alarm control panels or can be used as a stand alone device, connected to a triggered relay output.