Method and apparatus for delivering secured telephony service in a hydrid coaxial cable network
AssigneeU S West Advanced Technologies, Inc.
InventorGregory J. Beveridge
Life of this patent
Estimating the term…
Abstract
A hybrid coaxial cable network employing interdiction to ensure privacy in telephony communications. The video and telephony signals are secured such that telephony and interactive video signals to and from a subscriber do not appear on the network at any other undesired subscriber location.
Claims6
A method for segregating telephony services and telephony special services in a logical bus network, operating in the frequency domain, said network including a central office and a transport system connected to said central office, said central office including a telephony switch and special service equipment, said transport system including a fiber optic system and a coaxial cable system connected to said fiber optic system, said method comprising the steps of:
- dedicating at least one line card in said network to a subscriber;
- assigning a frequency pair to said line card, said frequency pair corresponding to one of said services;
- transmitting a signal including said frequency pair to and from said central office;
- recognizing said frequency pair as indicative of a telephony service or a telephony special service;
- and
- routing a recognized telephony service to said switch and routing a recognized telephony special service to said special services equipment.
A logical bus network operating in frequency domain, comprising:
- a central office including a digital switch and telephony special service equipment;
- a transport system operatively connected to said switch, said transport system including a fiber optic system and a coaxial cable system connected to said fiber optic system;
- a plurality of line cards operatively associated with said coaxial cable system;
- each said line card including a preselected frequency pair assigned thereto, said preselected frequency pair corresponding exclusively to either a telephony service or a telephony special service;
- means, associated with said digital transport system, for recognizing said assigned frequency pair;
- and
- whereby a signal from said line card is routed to said digital switch if said assigned frequency pair is recognized as a telephony service and a signal for said line card is routed to said special service equipment if said assigned frequency pair is recognized as a telephony special service.
Dependencies are inferred from the claim text.