Patent US5559858A successfully refreshed from Google Patents.
US5559858A
Expired / Lapsed
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Method and apparatus for delivering secured telephony service in a hydrid coaxial cable network
Assignee: Comcast MO Group Inc
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Filing: 1995-06-06
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Granted: 1996-09-24
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Expires: 2015-06-06
Abstract
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.
Inventors
- 👤 Gregory J. Beveridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:38
CPC Classifications
H; H04; H04H; H04H20/00; H04H20/65; H04H20/76; H04H20/77; H04H20/78; H04H20/79; H04H20/12; H04H60/00; H04H60/76; H04H60/81; H04H60/93; H04H60/94; H04H60/96; H04H60/97; H04M; H04M3/00; H04M3/08; H04M3/12; H04M3/22; H04M3/26; H04M3/28; H04M3/30; H04M3/302; H04M3/303; H04M7/00; H04M7/006; H04M9/00; H04M9/02; H04M9/022; H04M9/025; H04N; H04N7/00; H04N7/16; H04N7/173; H04N7/17345; H04N7/17354; H04Q; H04Q11/00; H04Q11/02; H04M3/20; H04M3/205
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
149 words
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.
Claim 2
Independent Claim
149 words
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.
Claim 3
Dependent Claim
21 words
A method according to claim 1 wherein said step of assigning includes remotely assigning said frequency pair from said central office.
Claim 4
Dependent Claim
151 words
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.
Claim 5
Dependent Claim
151 words
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.
Claim 6
Dependent Claim
24 words
A network according to claim 3 wherein said line card is included in network equipment remote from a subscriber location and said central office.
Claim 7
Dependent Claim
20 words
A network according to claim 3 further including means, associated with said transport system, for remotely assigning said frequency pair.
Claim 8
Dependent Claim
24 words
A method according to claim 1 wherein said line card is included in network equipment remote from a subscriber location and said central office.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-09-24 | 2000-03-25 | 2000-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-24 | 2004-03-25 | 2004-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-24 | 2008-03-25 | 2008-09-24 | $7700.00 | Window Closed / Lapsed |