Digital telephone, cable tv system and local exchange bypass...

Details Digital telephone, cable tv system and local exchange bypass... Digital telephone, cable tv system and local exchange bypass...

H - Electricity

04

B

H04B 7/26 (2006.01) H04J 1/00 (2006.01) H04L 9/14 (2006.01) H04L 12/28 (2006.01) H04N 7/08 (2006.01) H04N 7/10 (2006.01) H04N 7/173 (2006.01) H04Q 7/20 (2006.01) H04Q 11/04 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2118911

2118911 9306669 PCTABS00021 Cordless telephones (38) generate call relay packets. Packets from each cordless telephone are polled by an upstream polling unit avoiding multi-unit interference. Cell packets are transmitted via a cable TV system (36). Radiated frequencies of the cordless telephones are shifted in frequency as they enter or leave the TV feeder cable to allow frequency reuse. The upstream polling unit appends header information on the cell packets and converts them into standard SONET ATM protocol packets. The cell relay packets are switched by a cell relay type switch to create a cost-effective, alternative telephone system.

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