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Patent US6904142B1 successfully refreshed from Google Patents.
US6904142B1
Expired / Lapsed
US
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Digital exchanging apparatus and method of communication control
Assignee: Oki Electric Industry Co Ltd
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Filing: 2000-05-12
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Granted: 2005-06-07
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Expires: 2020-05-12
Abstract
Abstract IP-PBXs having different structure, for example, stand-by and active transmission lines are connected between unused pins of the interface block 24 A and 24 B to supply the relay driving signal from the switching block 20 A to the switching block 20 B according to a control signal from the control block 18, and change the transmission lines, and maintain a direct route.
Inventors
- 👤 Makoto Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:19
CPC Classifications
H; H04; H04M; H04M7/00; H04M7/0024; H04M7/0057; H04M3/00; H04M3/08; H04M3/12; H04M19/00; H04M3/005; H04M3/42; H04M3/42314
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
186 words
A digital exchange system comprising: a first digital exchange coupled to a first network, a second network, and a local area network (LAN), said first digital exchange comprising: a first LAN interface coupled to said LAN; a LAN switch coupled to said first LAN interface and said first network; a first packet processor coupled to said LAN switch; a first network interface coupled to said first packet processor, said first LAN interface, and said second network; a first switch coupled to said first LAN interface; and a controller coupled to said first switch; and a second digital exchange coupled to said local area network (LAN) and a subscriber, said second digital exchange comprising: a second LAN interface coupled to said LAN; a second packet processor coupled to said second LAN interface; a subscriber interface coupled to said second packet processor; and a second switch coupled to said subscriber interface, said second LAN interface, and said subscriber; wherein said controller, said first switch, and said second switch control connections between said subscriber, said first network, and said second network based on a detected failure in said system.
Claim 2
Dependent Claim
186 words
A digital exchange system comprising: a first digital exchange coupled to a first network, a second network, and a local area network (LAN), said first digital exchange comprising: a first LAN interface coupled to said LAN; a LAN switch coupled to said first LAN interface and said first network; a first packet processor coupled to said LAN switch; a first network interface coupled to said first packet processor, said first LAN interface, and said second network; a first switch coupled to said first LAN interface; and a controller coupled to said first switch; and a second digital exchange coupled to said local area network (LAN) and a subscriber, said second digital exchange comprising: a second LAN interface coupled to said LAN; a second packet processor coupled to said second LAN interface; a subscriber interface coupled to said second packet processor; and a second switch coupled to said subscriber interface, said second LAN interface, and said subscriber; wherein said controller, said first switch, and said second switch control connections between said subscriber, said first network, and said second network based on a detected failure in said system.
Claim 3
Dependent Claim
73 words
A digital exchange system as in claim 1 , wherein said first LAN interface and said second LAN interface are adapted to provide a non-failure mode connection between said first digital exchange and said second digital exchange, a failure mode connection between said first digital exchange and said second digital exchange, and a control connection from said first switch of said first digital exchange to said second switch of said second digital exchange.
Claim 4
Dependent Claim
32 words
A digital exchange system as in claim 2 , wherein said non-failure mode connection and said failure mode connection use separate lines of said first LAN interface and said second LAN interface.
Claim 5
Dependent Claim
37 words
A digital exchange system as in claim 3 , wherein said non-failure mode connection connects said LAN switch and said second packet processor, and said failure mode connection connects said first network interface and said second switch.
Claim 6
Dependent Claim
47 words
A digital exchange system as in claim 1 , wherein said system is adapted to connect said subscriber to said first network and said second network during non-failure operation of said system and to connect said subscriber to said second network during failure operation of said system.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2008-06-06 | 2008-12-06 | 2009-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-06-06 | 2012-12-06 | 2013-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-06-06 | 2016-12-06 | 2017-06-07 | $7700.00 | Window Closed / Lapsed |