06404773 is referenced by 250 patents and cites 6 patents.

Speech-band signals such as voice telephony and facsimile are trasnmitted over a power line communications system. The method comprises: receiving speech-band signals at the communications station from speech-band communications equipment; digitising the speech-band signals; encoding the digitised signals into data packets; and transmitting the data packets to/from a station over a part of the line which is external to the premises, using a packet data communications protocol. Equipment can selectively route the speech-band signals via the power line or the PSTN.

Title
Carrying speech-band signals over a power line communications system
Application Number
9/114778
Publication Number
6404773 (B1)
Application Date
July 13, 1998
Publication Date
June 11, 2002
Inventor
Martin Brent Daniells
Chelmsford
US
Robin Paul Rickard
Bishop's Stortford
US
Roy Leslie Williams
Bishop's Stortford
US
Agent
Lee Mann Smith McWilliams Sweeney & Ohlson
US
Assignee
Nortel Networks
US
IPC
H04L 12/66
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