Patent ID: 6327342
Filing Date: 2001-12-04
Classification: H04M

Abstract:
An apparatus for providing a back-up service for an E911 call answering system, wherein the E911 call answering system comprises a plurality of E911 trunk lines operable for carrying a plurality of incoming telephone calls, comprising:a control unit operative for monitoring a plurality alarm signals generated by the 911 system;a switching circuit operative for routing the incoming telephone calls carried by the plurality of 911 trunk lines to a plurality of telephones when the switching unit detects at least one of the plurality of alarm signals;an input port operative for receiving the incoming telephone calls carried is by the plurality of trunk lines, the alarm signals generated by the E911 backup system, and a power signal;an output port connected to the switching circuit plurality operative for transmitting the telephonic data from the trunk lines to at least one of a plurality of telephone handsets; anda data bus operable for carrying information between the control unit, the switching unit and the display circuit.