Patent ID: 6813353
Filing Date: 2004-11-02
Classification: H04M

Abstract:
An apparatus for controllably supplying ringing signals to a plurality of telecommunication circuits comprising:a plurality of electrically isolatable ringing signal bus segments through which ringing signals applied thereto are delivered to one or more of said plurality of telecommunication circuits; and a plurality of redundant ringing voltage generators providing internally and/or externally sourced ringing voltages and being selectively connectable to said plurality of ringing bus segments, and wherein a respective ringing voltage generator is operative, in response to the ringing signal provided thereby being within a prescribed specification, to connect said ringing signal to its associated ringing bus segment, and to isolate said associated ringing bus segment from another ringing bus segment but, in response to a prescribed anomaly in the ringing signal provided thereby, to disconnect said ringing signal from said associated ringing bus segment, and to connect said associated ringing bus segment to a redundant ringing signal and further comprising a bus-shorting relay operatively connected to respective ringing signal bus segments and controlled by said ringing voltage generator to short together ringing signal bus segments and provide said ringing bus signal.