Patent ID: 6243446
Filing Date: 2001-06-05
Classification: H04H,H04M,H04N

Abstract:
A system for communicating information between an external source of information and destinations of information over a telephone wiring network used for passing telephone signals in a telephone voice band between a plurality of telephone devices and a telephone exchange, comprising:a transceivers coupled between a conductive path of the telephone wiring network and a first destinations of information, including circuitry coupled to said conductive path for accepting signals in a high frequency band of frequencies above the highest frequency of the telephone voice band and rejecting signals in the telephone voice band;a plurality of filters, each coupled between said conductive path and a corresponding one of the plurality of telephone devices, for preventing transmission of signals in the high frequency band to the telephone devices; anda signal interface coupled between the external source of information and said conductive path, includingcircuitry for receiving an external signal encoding an information stream from the external source of information,circuitry for transmitting over the telephone wiring network to the transceiver an internal signal in the high frequency band encoding the information stream, andcircuitry for limiting transmission of the internal signal in the high frequency band from the telephone wiring network to the telephone exchange and for passing signals in the telephone frequency band between the telephone wiring network and the telephone exchange;wherein each of the plurality of filters is coupled to said conductive path at a location separated from the transceiver and from the signal interface.