US3697672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the establishment of conference telegraphy connections in centrally controlled telegraphy dial exchange installations
Assignee: Siemens AG
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Filing: 1969-08-18
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Granted: 1972-10-10
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Expires: 1989-08-18
Abstract
Abstract In centrally controlled telegraphy dial exchange installations provided with a facility for making conference connections, the conference telegraphy system is connected to the trunk seized by the calling subscriber over an outgoing trunk, whereupon information necessary to establish the conference connection is registered. Then the conference telegraphy system seizes a number of incoming trunks corresponding to the number of subscribers to take part in the conference call, and the establishment of and accounting for the conference call proceed over the central control means of the exchange, in the manner of individual connections.
Inventors
- 👤 Hans Reisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:08
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/02; H04L12/16; H04L12/18; H04L12/1813; H04L12/1818; H04L12/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
125 words
A method for establishing conference telegraphy connections in a centrally controlled dial exchange installation, comprising the steps of: connecting a conference telegraphy frame over an outgoing trunk line of said exchange, through the central control, to an incoming trunk line of said exchange previously seized by a calling subscriber and to a register in said exchange, causing the request, evaluation and storage of information necessary to the completion of a conference connection, seizing, using the conference telegraphy frame, a number of incoming trunk lines corresponding to the number of subscribers to be called into the conference, communicating said information to the central control and establishing the conference telegraphy connections over the central control in the same manner according to which individual connections would be completed.
Claim 2
Independent Claim
125 words
A method for establishing conference telegraphy connections in a centrally controlled dial exchange installation, comprising the steps of: connecting a conference telegraphy frame over an outgoing trunk line of said exchange, through the central control, to an incoming trunk line of said exchange previously seized by a calling subscriber and to a register in said exchange, causing the request, evaluation and storage of information necessary to the completion of a conference connection, seizing, using the conference telegraphy frame, a number of incoming trunk lines corresponding to the number of subscribers to be called into the conference, communicating said information to the central control and establishing the conference telegraphy connections over the central control in the same manner according to which individual connections would be completed.
Claim 3
Dependent Claim
64 words
The method according to claim 1, including the step of connEcting the incoming trunks (VekR1 to UekR5) seized by the conference telegraphy frame (RE) to a charge determination system (over G) of the exchange office (VA) in the same manner as an ordinary incoming trunk, determining the charge for each conference telegraphy connection according to the principle of charge determination of an individual connection.
Claim 4
Dependent Claim
40 words
The method according to claim 1, including the step of determining the allowability of a desired conference telegraphy connection (in evaluator BW) before a connection is fully established and in case of a negative finding, releasing the partially established connection.
Claim 5
Dependent Claim
145 words
Apparatus for the formation of conference telegraphy connections in centrally controlled dial exchange installations having a conference telegraphy frame constituted by a text generator, an evaluator and a conference register adapted to receive in continuous series all information sent by the calling subscriber for completing a conference connection, comprising: means for connecting the input of said conference frame to an outgoing trunk line of said exchange responsive to evaluation of a special signal dialled by the calling subscriber, by said central control, means for connecting the outputs of said conference frame to a number of incoming trunk lines corresponding to the number of called subscribers to be connected into the conference and, means for communicating the information contained in said conference register to said central control for completing the conference connection to said called subscribers in the same manner as individual connections would be completed.
Claim 6
Dependent Claim
145 words
Apparatus for the formation of conference telegraphy connections in centrally controlled dial exchange installations having a conference telegraphy frame constituted by a text generator, an evaluator and a conference register adapted to receive in continuous series all information sent by the calling subscriber for completing a conference connection, comprising: means for connecting the input of said conference frame to an outgoing trunk line of said exchange responsive to evaluation of a special signal dialled by the calling subscriber, by said central control, means for connecting the outputs of said conference frame to a number of incoming trunk lines corresponding to the number of called subscribers to be connected into the conference and, means for communicating the information contained in said conference register to said central control for completing the conference connection to said called subscribers in the same manner as individual connections would be completed.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |