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Supervises the main and backup phone lines for sustained drop in voltage and alerts users with a built-in sounder and indication at the keypad and monitoring center.

Installs in panel enclosure and connects to panel through a wire harness and phone cord

Indicate a phone line failure to the premises and central station

Switches to secondary phone line communication when the primary line is down

Phone line trouble is displayed in the keypad Status List as a System Trouble

For all of our modules and expanders, please view our catalog.