US3865999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic telecommunication switching system
Assignee: International Standard Electric Corp
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Filing: 1973-02-26
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Granted: 1975-02-11
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Expires: 1993-02-26
Abstract
Abstract A switching system employs switching equipment and its control system includes two computers which are normally in an on-line load-sharing condition. Means are provided in case switching equipment must be tested to place either one of the computers first in a transient condition wherein it is able to continue the processing of calls but cannot handle new calls and then in a standby condition wherein it is prevented to handle calls but is able to test the switching equipment. Hereby the other computer remains in the on-line condition. Means are provided in case a fault occurs in the on-line computer during the tests to switch the standby computer back into the on-line condition and to complete calls started by the former on-line computer by accessing the memory thereof.
Inventors
- 👤 Josef Margaretha Desi Spitaels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:04
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/54; H04Q3/545; H04Q3/54541; H04Q3/54558
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
70 words
An automatic telecommunication switching system comprising switching equipment, a control system including two computers adapted to control the establishment and release of call communications through said switching equipment, said control system further including control means cooperative with one of said computers to place said one computer in a standby condition wherein it is prevented from processing new call communications but is able to execute test operations on said switching equipment.
Claim 2
Dependent Claim
70 words
An automatic telecommunication switching system comprising switching equipment, a control system including two computers adapted to control the establishment and release of call communications through said switching equipment, said control system further including control means cooperative with one of said computers to place said one computer in a standby condition wherein it is prevented from processing new call communications but is able to execute test operations on said switching equipment.
Claim 3
Dependent Claim
55 words
An automatic telecommunication switching system according to claim 1, in which said computer in the standby condition is placed in the operative condition when the operating computer has become faulty, and the computer in the standby condition has access to a memory storing information at least about the call communications handled by said other computer.
Claim 4
Dependent Claim
50 words
An automatic telecommunication switching system according to claim 2, in which said computers each have an individual memory, intercommunication means interconnecting said memories, each computer employing said intercommunication means to store information concerning call communications handled by said other computer in the memory of the computer in the standby condition.
Claim 5
Dependent Claim
28 words
An automatic telecommunication switching system according to claim 1, in which said test operations are used to test newly added switching equipment before putting the latter into service.
Claim 6
Dependent Claim
33 words
An automatic telecommunication switching system according to claim 1, in which said test operations are used to test existing and newly added switching equipment before putting the newly added switching equipment into service.
Claim 7
Dependent Claim
71 words
An automatic telecommmunication switching system according to claim 1, in which said control means are able to initiate in both said computers the execution of a special program to place one of these computers first in a transient condition and then in said standby condition, said one computer in said transient condition being prevented from handling new call communication but being able to continue the processing oF already started call communications.
Claim 8
Dependent Claim
40 words
An automatic telecommunication switching system according to claim 6, in which said computers each have an individual memory and said special program includes placing said one computer in said transient condition by modifying and operational program stored in said memory.
Claim 9
Dependent Claim
36 words
An automatic telecommunication switching system according to claim 6, in which said special program includes counting a predetermined time interval and placing said one computer in said standby condition after said predetermined time interval has elapsed.
Claim 10
Dependent Claim
43 words
An automatic telecommunication switching system according to claim 6, in which said special program includes checking whether all said call communications are in a communication phase and in bringing said one computer in said standby condition when said checking operation has been successful.
Claim 11
Dependent Claim
68 words
An automatic telecommunication switching system according to claim 6, in which said special program includes placing said one computer in said transient condition, starting the counting of a predetermined time interval, checking to see whether all said call communications are in a communication phase, and placing said one computer in said standby condition when either said predetermined time interval has been counted or said checking has been successful.
Claim 12
Dependent Claim
87 words
An automatic telecommunication switching system according to claim 6, in which said control means are able to feed to both said computers information containing the identity of the computer to be brought in said standby condition, the execution of said special program in a said computer before possibly placing it in said transient condition including the comparison of the computer identity stored in said information and the identity of the computer stored in the memory thereof, the special program being only continued when this comparison is successful.
Claim 13
Dependent Claim
88 words
An automatic telecommunication switching system according to claim 6, in which said control means are able to feed information to both said computers containing the status of the computer not to be placed in said standby condition, the execution of said special program in a said computer before possibly placing it in said transient condition including the comparison of the computer status stored in said information and the condition of the computer stored in the memory thereof, the special program being only continued when this comparison is successful.
Claim 14
Dependent Claim
60 words
An automatic telecommunication switching system according to claim 6, in which said special program further includes signalling to the other computer that it has been brought in said standby condition in order that the latter be informed that it should execute a take-over program stored in said memory in order to take-over the call communications processed by said one computer.
Claim 15
Dependent Claim
31 words
An automatic telecommunication switching system according to claim 6, in which said special program also includes loading a test program containing said test operations from an outside memory in said memory.
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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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |