US3688049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pcm time division multiplex process
Assignee: Siemens AG
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Filing: 1970-08-26
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Granted: 1972-08-29
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Expires: 1990-08-26
Abstract
Abstract A process for jointly completing a connection for both transmission directions in a pulse code modulated telecommunication network having a plurality of exchange stations connected over four wire time division multiplex lines. The system operates according to the invention to complete a connection in segments simultaneously for both transmission directions without the need for frame equalization.
Inventors
- 👤 Max Schlichte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:14
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
220 words
In a PCM time division multiplex telecommunication network, a process for the joint completion of connections in both transmission directions, said network having a plurality of PCM time division multiplex exchange stations connected among each other over four wire PCM time division multiplex lines, a connection being thereby completed between predetermined ones of said exchange stations, said process comprising the steps of: assigning to each of said predetermined exchange stations in a first free selection process a first free time channel lying, in time, behind the time channel assigned to said connection being completed over a transmission line leading to a respective predetermined exchange station, said first free time channel being assignable to said connection being completed over a transmission line leading from said respective predetermined exchange station to the next succeeding exchange station in said connection being completed, assigning a second time channel to a connection leading to the next preceding exchange station in the connection being completed, said second time channel being selected and reported by said next preceding exchange station, and assigning to said connection being completed in a second free selection process a last free time channel lying, in time, before said second time channel which is assignable to said connection on a line leading to said respective exchange station from said next succeeding exchange station.
Claim 2
Dependent Claim
220 words
In a PCM time division multiplex telecommunication network, a process for the joint completion of connections in both transmission directions, said network having a plurality of PCM time division multiplex exchange stations connected among each other over four wire PCM time division multiplex lines, a connection being thereby completed between predetermined ones of said exchange stations, said process comprising the steps of: assigning to each of said predetermined exchange stations in a first free selection process a first free time channel lying, in time, behind the time channel assigned to said connection being completed over a transmission line leading to a respective predetermined exchange station, said first free time channel being assignable to said connection being completed over a transmission line leading from said respective predetermined exchange station to the next succeeding exchange station in said connection being completed, assigning a second time channel to a connection leading to the next preceding exchange station in the connection being completed, said second time channel being selected and reported by said next preceding exchange station, and assigning to said connection being completed in a second free selection process a last free time channel lying, in time, before said second time channel which is assignable to said connection on a line leading to said respective exchange station from said next succeeding exchange station.
Claim 3
Dependent Claim
28 words
The process defined in claim 1 wherein the assignment of said last free time channel is reported to said next succeeding exchange station on said first time channel.
Claim 4
Dependent Claim
72 words
The process defined in claim 1 wherein said network includes an origin terminal apparatus connected to said next preceding exchange station comprising the additional steps of: assigning a third time channel over a transmission line leading from said origin terminal apparatus to said next preceding exchange station, and reporting the assignment of said thIrd time channel over a transmission line leading from said next preceding exchange station to said origin terminal apparatus.
Claim 5
Dependent Claim
76 words
The process defined in claim 1 wherein said network includes a destination terminal apparatus connected to said next succeeding exchange station, comprising the additional steps of: storing in said destination terminal apparatus information about a fourth time channel reported from said next succeeding exchange station and assigned to said connection being completed in a destination to origin direction, and storing in association therewith information about a fifth time channel extending from said origin to said destination.
References Cited (Backward Citations)
US3236951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |