Television – Special applications – Manufacturing
Patent
1994-11-28
1996-03-12
Groody, James J.
Television
Special applications
Manufacturing
348 12, 455 31, H04N 7173
Patent
active
054990475
ABSTRACT:
A cable television network is supplemented with optical fibers and fiber termination units to communicate additional downstream digital signals and upstream signals. A drop unit for each customer premises is provided in the drop cable. The drop unit demodulates downstream signals and selects for delivery to the customer premises only those downstream signals addressed to the customer premises, modulating the selected signals using binary phase shift keying (BPSK) which provides relative immunity to noise for forwarding the signals to the customer premises. Upstream BPSK signals from the customer premises are demodulated and remodulated in the drop unit to isolate the customer premises wiring from the rest of the network.
REFERENCES:
patent: 3581209 (1971-05-01), Zimmerman et al.
patent: 3987398 (1976-10-01), Fung
patent: 4268859 (1981-05-01), Ost
patent: 4367557 (1983-01-01), Stern et al.
patent: 5126840 (1992-06-01), Dufresne et al.
patent: 5408260 (1995-04-01), Arnon
patent: 5421030 (1995-05-01), Baran
J. Terry, "Future Directions--Broadband ISDN Access--Alternative Technologies and Delivery Systems", IEEE ISDN '91, Tucson, Arizona; published IEEE Communications Magazine, Aug. 1992.
Anderson Carl W. C.
Terry John B.
Warwick Alastair A.
Grant Chris
Groody James J.
Haley R. John
Northern Telecom Limited
LandOfFree
Distribution network comprising coax and optical fiber paths for does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Distribution network comprising coax and optical fiber paths for, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Distribution network comprising coax and optical fiber paths for will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2103766