US4027098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for establishing conference connections in dial-operated telecommunication exchanges
Assignee: Siemens AG
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Filing: 1975-12-22
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Granted: 1977-05-31
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Expires: 1995-12-22
Abstract
Abstract A method for operating dial-operated telecommunication exchanges equipped with broadcast devices to make conference connections is described. Responsive to signals emitted from a calling subscriber, a conference switching device assigned to the broadcast device is activated; the conference switching device completes the connection in accordance with the switching information contained in the aforementioned signals. The connection is completed as a conventional conference connection in which all participating called subscribers receive all transmitted messages, as a semi-conference connection wherein messages transmitted by each called subscriber are received only by the calling subscriber or as a sub-conference connection wherein messages transmitted by the calling subscriber are received only by a specific called subscriber and messages transmitted by the latter are received only by the calling subscriber.
Inventors
- 👤 Hans Reisch
- 👤 Dieter Giersberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:42
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/02; H04L12/16; H04L12/18; H04L12/1813; H04L12/1818; H04L12/1822
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
135 words
A method for selectively establishing variably restrictive forms of multiaddress connections in dial-operated teleprinter exchanges, comprising: emission of a first signal from a calling subscriber station including a specific symbol combination in accordance with a desired form of multiaddress connection and containing switching information corresponding to the form of multiaddress connection to be completed, establishing, in accordance with the switching information contained in said first signal, a broadcast connection, a conference connection wherein all called subscribers receive all message signals, a semi-conference connection wherein message signals transmitted by the called subscribers are each received only by said calling subscriber, or a sub-conference connection wherein message signals transmitted by said calling subscriber are received only by a specific called subscriber and message signals transmitted by the specific called subscriber are received only by said calling subscriber.
Claim 2
Independent Claim
135 words
A method for selectively establishing variably restrictive forms of multiaddress connections in dial-operated teleprinter exchanges, comprising: emission of a first signal from a calling subscriber station including a specific symbol combination in accordance with a desired form of multiaddress connection and containing switching information corresponding to the form of multiaddress connection to be completed, establishing, in accordance with the switching information contained in said first signal, a broadcast connection, a conference connection wherein all called subscribers receive all message signals, a semi-conference connection wherein message signals transmitted by the called subscribers are each received only by said calling subscriber, or a sub-conference connection wherein message signals transmitted by said calling subscriber are received only by a specific called subscriber and message signals transmitted by the specific called subscriber are received only by said calling subscriber.
Claim 3
Dependent Claim
41 words
The method defined in claim 1 comprising the additional step of: sending to said calling subscriber station a second signal, upon completion of the selected connection indicated by said first signal, having a symbol combination like that of said first signal.
Claim 4
Dependent Claim
42 words
The method defined in claim 1 comprising the additional step of: transmitting a third signal from said calling subscriber station indicating which of the called subscriber stations are to participate in the connection, said third signal being transmitted following said first signal.
Claim 5
Dependent Claim
20 words
The method defined in claim 1 wherein said first signal is emitted at an arbitrary time during an existing connection.
Claim 6
Dependent Claim
56 words
The method defined in claim 1 comprising the additional steps of: sending, in the case of a said sub-conference connection, a wait signal to those of the called subscriber stations not participating in the sub-conference connection and resending from the calling subscriber station the said first signal initiating the sub-conference connection to terminate the sub-conference connection.
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) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |