US3588369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precedence trunk selection in a central processor controlled communication switching system
Assignee: GTE Automatic Electric Laboratories Inc
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Filing: 1969-05-28
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Granted: 1971-06-28
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Expires: 1989-05-28
Abstract
Abstract A TRANSLATOR AND ROUTE SELECTOR OF A CENTRAL PROCESSOR INCLUDES A COMMON MEMORY WITH A SET OF CORES FOR EACH TRUNK TO RECORD ITS STATUS AS IDLE OR BUSY AT ONE OF SEVERAL POSSIBLE LEVELS OF PRECEDENCE. THE ROUTE-SELECTOR INCLUDES A STATUS-CIRCUIT WITH A FLIP-FLOP FOR EACH POSSIBLE LEVEL OF PRECEDENCE. DURING A FIRST SCAN EACH FLIP-FLOP IS SET IF A TRUNK IS FOUND AT THE CORRESPONDING STATUS, AND IF AN IDLE TRUNK IS FOUND IT IS SELECTED. IF NONE IS SELECTED A PREEMPT CONTROL FLIP-FLOP IS SET, AND THE SCAN IS REPEATED TO SELECT A TRUNK AT THE LOWEST LEVEL RECORDED BY THE STATUS CIRCUIT.
Inventors
- 👤 David K K Lee
- 👤 Howard L Wirsing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:30
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |