Patent US2790095A successfully refreshed from Google Patents.
US3868482A
Expired / Lapsed
US
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Line scanning system in an exchange center
Assignee: International Business Machines Corp
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Filing: 1972-12-21
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Granted: 1975-02-25
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Expires: 1992-12-21
Abstract
Abstract Apparatus and method for collecting and processing line state information. The apparatus includes a line scanner, storages for present line state, former line state and line active-idle status, comparison means to detect change in line state and selector means to transmit the detected changes alternatively for lines of active or idle status, and separate queus under the control of an active-idle line status input control for storing the results of the change detector according to the status of the lines being scanned. The apparatus facilitates carrying out of line state change collecting and processing method wherein the change information is processed in a manner which gives priority to the information concerning active lines.
Inventors
- 👤 Jean Daniel Colas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:43
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/54; H04Q3/545; H04Q3/54575; H04Q3/54591
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
209 words
A method for collecting and processing information relating to the change of states of the lines provided in an exchange center, characterized in that: the lines are classifeid in two classes (active lines and idle lines), a change of class being possible during the processing operation; the lines are scanned and tested for state change in active lines in scanning phases recurrent at regular intervals, and the lines are scanned and tested for state change in idle lines in scanning periods recurrent at regular intervals; the state change information waiting for processing and relating to the active lines and the state change information relating to the idle lines are stored into two different assemblies of memory positions, one said assembly defining a queue of active lines and the other defining a queue of idle lines, scanning periods being terminated without completion when said queue of idle lines is full, at least said assembly for active lines having capability to buffer more than one change indication for the same line, and the information is processed in accordance with rules giving priority to the information stored in the queue of the active lines, whereby unprocessed information derived from a plurality of scans can be buffered and processed in an orderly manner.
Claim 2
Independent Claim
209 words
A method for collecting and processing information relating to the change of states of the lines provided in an exchange center, characterized in that: the lines are classifeid in two classes (active lines and idle lines), a change of class being possible during the processing operation; the lines are scanned and tested for state change in active lines in scanning phases recurrent at regular intervals, and the lines are scanned and tested for state change in idle lines in scanning periods recurrent at regular intervals; the state change information waiting for processing and relating to the active lines and the state change information relating to the idle lines are stored into two different assemblies of memory positions, one said assembly defining a queue of active lines and the other defining a queue of idle lines, scanning periods being terminated without completion when said queue of idle lines is full, at least said assembly for active lines having capability to buffer more than one change indication for the same line, and the information is processed in accordance with rules giving priority to the information stored in the queue of the active lines, whereby unprocessed information derived from a plurality of scans can be buffered and processed in an orderly manner.
Claim 3
Dependent Claim
53 words
The method according to claim 1 characterized in that the lines at rest are classified into the idle line class and in that an idle line is classified into the active line class when the information relating to an application of voltage corresponding to an off-hook condition of that line has been processed.
Claim 4
Dependent Claim
42 words
The method according to claim 1 characterized in that a change of state information contained in the queue of the idle lines is taken into account for processing only if the queue of the active line is free of any change-of-state information.
Claim 5
Dependent Claim
43 words
The method according to claim 2 characterized in that a change of state information contained in the queue of the idle lines is taken into account for processing only if the queue of the active lines class is free of any change-of-state information.
Claim 6
Dependent Claim
53 words
The method according to claim 1 characterized in that the operation of the exchange center includes active line scanning steps during which the changes of state of active lines are detected and memorized, idle line scanning steps during which the changes of state of idle lines are detected and memorized, and processing steps.
Claim 7
Dependent Claim
78 words
The method according to claim 5 characterized in that, during the scanning periods and phases, all the lines are tested, so far as the scanning is carried, but the change-of-state information is transmitted to the appropriate queue by a filtering system which allows passage of only the information concerning the lines of the class to be scanned in the current scanning period or phase, and characterized further in that each scanning period is followed by a scanning phase.
Claim 8
Dependent Claim
193 words
Apparatus for collecting and processing information relating to the change of state of active and idle lines provided in an exchange center, including means to test the state of the lines, means to memorize the results of the tests, comparing means to compare the results of the tests with the previously memorized results, storing means to memorize the results of the comparisons, filtering means to transmit the results of the comparisons to the storing means selectively, according to the active-idle status of the lines, control means to control said filTering means, and means to analyse the information recorded in the storing means, characterized by directing means responsive to said control means to act in correspondence with said filtering control means to select the part of storing means to which the results of the comparisons transmitted by filtering means are supplied, at least the part to which the results with regard to active lines are supplied having a plurality of memory positions to enable retention of test results for the same line from plural successive scans, and characterized further by indicator means responsive to full condition of the other part of said storing means.
Claim 9
Dependent Claim
193 words
Apparatus for collecting and processing information relating to the change of state of active and idle lines provided in an exchange center, including means to test the state of the lines, means to memorize the results of the tests, comparing means to compare the results of the tests with the previously memorized results, storing means to memorize the results of the comparisons, filtering means to transmit the results of the comparisons to the storing means selectively, according to the active-idle status of the lines, control means to control said filTering means, and means to analyse the information recorded in the storing means, characterized by directing means responsive to said control means to act in correspondence with said filtering control means to select the part of storing means to which the results of the comparisons transmitted by filtering means are supplied, at least the part to which the results with regard to active lines are supplied having a plurality of memory positions to enable retention of test results for the same line from plural successive scans, and characterized further by indicator means responsive to full condition of the other part of said storing means.
Claim 10
Dependent Claim
57 words
Apparatus in accordance with claim 7, wherein said filtering means comprises a register of old line status, and mask means responsive thereto and operative selectably under the control of said control means to represent active line status or its complement, whereby scan comparison results concerning only active or idle lines are transmitted to said storing means, selectively.
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) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |