Patent US2960167A successfully refreshed from Google Patents.
Patent EP0302646A2 successfully refreshed from Google Patents.
EP0302646A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Device for establishing and controlling virtual networks
Assignee: AT&T Inc
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Filing: 1988-07-26
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Granted: —
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Expires: 2008-07-26
Abstract
Abstract A system is disclosed for completing communication connections from end-users served by a connectionless (broadcast) type system in a manner which allows expansion of the calling area beyond the immediate physical limitations of the broadcast media. The system is based upon a device for mediating between the connectionless system and a connection oriented system. The device creates logical local area networks interconnectable by the connection oriented system. Calling user identification is used in conjunction with call completion data stored in a central memory for controlling all interconnections.
Inventors
- 👤 Kenneth King-Yu Chan
- 👤 Philip William Hartmann
- 👤 Scott Putnam Lamons
- 👤 Terry Gregory Lyons
- 👤 Argyrios Constantine Milonas
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 17:30
CPC Classifications
H; H04; H04L; H04L41/00; H04L41/26; H04L12/00; H04L12/28; H04L12/46; H04L12/4641; Y; Y10; Y10S; Y10S370/00; Y10S370/908
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
148 words
A device for controlling communications between a plurality of end-systems (120A, 120B, 121A, 121B, 122, 3B2, 111), said device CHARACTERIZED BY means (102, FIG.6) for establishing at least one group of end-systems, each established group identifying each end-system authorized to be a member thereof, means (101, 102, 202, 203) for receiving first information from a calling one of said end-systems, said first information including an identification of this end-system and a request for membership in one established group, means (102, 204-210) responsive to said first information and to said established group for granting said request if and only if said calling end-system is an authorized member of the group requested, and means (102, 303) responsive to second information from said calling end-system and to the granting of said request for controlling communications between this calling end-system and a called one of said end-systems identified in said second information.
Claim 2
Independent Claim
148 words
A device for controlling communications between a plurality of end-systems (120A, 120B, 121A, 121B, 122, 3B2, 111), said device CHARACTERIZED BY means (102, FIG.6) for establishing at least one group of end-systems, each established group identifying each end-system authorized to be a member thereof, means (101, 102, 202, 203) for receiving first information from a calling one of said end-systems, said first information including an identification of this end-system and a request for membership in one established group, means (102, 204-210) responsive to said first information and to said established group for granting said request if and only if said calling end-system is an authorized member of the group requested, and means (102, 303) responsive to second information from said calling end-system and to the granting of said request for controlling communications between this calling end-system and a called one of said end-systems identified in said second information.
Claim 3
Dependent Claim
30 words
The device of claim 1 CHARACTERIZED IN THAT said controlling means couples communications between said calling and called end-systems if an only if these end-systems are within a single group.
Claim 4
Dependent Claim
27 words
The device of claim 1 CHARACTERIZED IN THAT said communication controlling means prevents communications between said calling and called end-systems when these end-systems are within different groups.
Claim 5
Dependent Claim
39 words
The device of claim 1 further CHARACTERIZED BY means (102, 305, 306) for determining whether there is communication compatibility between said calling and called end-systems and for preventing communications between calling and called end-systems if a communication incompatibility exists.
Claim 6
Dependent Claim
17 words
The device of claim 4 CHARACTERIZED IN THAT said communication incompatibility results from unlike communication establishment protocols.
Claim 7
Dependent Claim
36 words
The device of claim 1 CHARACTERIZED IN THAT said second information includes an identification of other called ones of said end-systems and said controlling means controls communication between said calling end-system and said other called end-systems.
Claim 8
Dependent Claim
29 words
The device of claim 1 CHARACTERIZED IN THAT said establishing means includes means (103) for specifying at least one group as an authorized group for each of said end-systems.
Claim 9
Dependent Claim
36 words
The device of claim 1 CHARACTERIZED IN THAT said controlling means includes means (102, 304, 306) for sending special instructions pertaining to communications between said calling and called end-systems, said special instructions pertaining to communication completion.
Claim 10
Dependent Claim
20 words
The device of claim 8 CHARACTERIZED IN THAT the special instructions sent to said calling and called end-systems are identical.
Claim 11
Dependent Claim
46 words
The device of claim 1 further CHARACTERIZED BY a communication switch (10) operating in a connection oriented mode, means (105, 106) for connecting said connection oriented switch to said end-systems which operate in a connectionless mode, and means (120) for connecting said switch to said device.
References Cited (Backward Citations)
No citation records indexed.
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