DETECTION AND REPORTING DEFECTIVE TELEPHONE LINES AND ALARM EVENTS

摘要

Optically isolated input circuits and a processor (202) interface with either a switch closure event detector (220) or a pulse generator to rapidly detect changes in the status of inputs representing events such as telephone line (106) cuts and emergency conditions. The processor determines telephone line status by applying software algorithms (214) to data acquired with a voltage sampling circuit (208, 210). The processor initializes a radio module (204) to wirelessly transmit information regarding detected events over a local wireless system to an event clearinghouse.