Automatic local alerts to phone line faults or disruption of service. Audible alerts can be silenced. Visual alert resets automatically when phone line is restored. Phone Line Verifier is excellent for your garage, stairwell, and area of refuge / rescue phones.
The technology you need to comply with emerging codes. Telephone line status verification is a requirement of ASME A 17.1b-2009 for new or altered elevators. (Section 126.96.36.199.6) This product is designed to detect faults and disruptions in telephone service and provide visual and audible local alerts when a problem is detected.