Patent US3754127A successfully refreshed from Google Patents.
US3754127A
Expired / Lapsed
US
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Emergency supervising equipment
Assignee: Fujitsu Ltd
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Filing: 1971-11-04
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Granted: 1973-08-21
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Expires: 1991-11-04
Abstract
Abstract Emergency supervising equipment for supervising the overall operation of the processing program operation of a stored program controlled switching system. The equipment periodically applies a simulated starting signal to an incoming trunk circuit of the switching system. The emergency supervising equipment comprises means for detecting a responsive reversal signal sent back from the incoming trunk circuit when the trunk circuit is connected to an incoming register trunk circuit. The equipment determines that a normal condition prevails when the reversal signal is received within a certain period and it determines that an emergency condition exists when the reversal signal is not received within a certain predetermined period. The equipment may be so constructed as to determine the emergency condition only after detecting a certain predetermined number of successive faulty conditions or it may be so constructed to determine the emergency condition only when a predetermined number of simultaneous faulty conditions are detected using a plurality of the supervising equipments.
Inventors
- 👤 T Uno
- 👤 H Munetaka
- 👤 S Kutsukake
- 👤 T Kataoka
- 👤 N Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:39
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/54; H04Q3/545; H04Q3/54575; H04Q3/54591; H04M; H04M3/00; H04M3/22; H04M3/26; H04M3/28; H04M3/32; H04M3/323
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
151 words
Emergency supervising equipment for supervising the normal operating condition of a stored program common controlled electronic switching system comprising, means for periodically applying a simulated calling condition signal to an incoming trunk of the switching system, means for detecting a response indicating reverse signal derived from the incoming trunk of the switching system when it is connected to an incoming register of the switching system, and means responsive to said detecting means for judging the operation of the switching system as normal when the response indicating reverse signal derived from the incoming trunk of the switching system is received within a certain period after seizure of the trunk and for judging the system as faulty when said response indicating reverse signal is not received within said certain predetermined period, said means for judging operating autonomously and existing in said switching system independently from the central control equipment of the switching system.
Claim 2
Dependent Claim
151 words
Emergency supervising equipment for supervising the normal operating condition of a stored program common controlled electronic switching system comprising, means for periodically applying a simulated calling condition signal to an incoming trunk of the switching system, means for detecting a response indicating reverse signal derived from the incoming trunk of the switching system when it is connected to an incoming register of the switching system, and means responsive to said detecting means for judging the operation of the switching system as normal when the response indicating reverse signal derived from the incoming trunk of the switching system is received within a certain period after seizure of the trunk and for judging the system as faulty when said response indicating reverse signal is not received within said certain predetermined period, said means for judging operating autonomously and existing in said switching system independently from the central control equipment of the switching system.
Claim 3
Dependent Claim
54 words
Emergency supervising equipment as claimed in claim 1, further comprising means for reconnecting the supervising equipment to other incoming trunks when a faulty condition of the switching system is detected, and means for determining that the switching system is in an emergency state when a successive predetermined number of said faulty conditions are detected.
Claim 4
Dependent Claim
65 words
Emergency supervising system comprising a plurality of said emergency supervising equipment as claimed in claim 1, wherein thE plurality of said emergency supervising equipment are connected to different incoming trunk terminals of the switching system, wherein an emergency condition of the switching system is determined when more than a predetermined number of the plurality of equipment identify faulty condition of the switching system in parallel.
Claim 5
Dependent Claim
42 words
Emergency supervising equipment as claimed in claim 1, further comprising an emergency recovering circuit and means responsive to said judging means when a faulty system is determined for starting said emergency recovering circuit provided in a controlling system of the switching system.
Claim 6
Dependent Claim
42 words
Emergency supervising equipment as claimed in claim 2, further comprising an emergency recovering circuit and means responsive to said judging means when a faulty system is determined for starting said emergency recovering circuit provided in a controlling system of the switching system.
Claim 7
Dependent Claim
42 words
Emergency supervising system as claimed in claim 3, further comprising an emergency recovering circuit and means responsive to said judging circuit when a faulty system is determined for starting said emergency recovering circuit provided in a controlling system of the switching system.
Claim 8
Dependent Claim
99 words
Emergency supervising equipment for supervising the operating condition of a stored program common controlled electronic switching system comprising, means for applying a simulated incoming call signal to an incoming trunk of said switching system, means for detecting a response indicating signal from said incoming trunk, means from applying an alarm signal to said emergency supervising equipment a predetermined time after the application of said simulated incoming call signal to said incoming trunk, means responsive to the reception of the alarm signal by the emergency supervising equipment prior to detection of said response indicating signal for triggering a fault indicator.
Claim 9
Dependent Claim
99 words
Emergency supervising equipment for supervising the operating condition of a stored program common controlled electronic switching system comprising, means for applying a simulated incoming call signal to an incoming trunk of said switching system, means for detecting a response indicating signal from said incoming trunk, means from applying an alarm signal to said emergency supervising equipment a predetermined time after the application of said simulated incoming call signal to said incoming trunk, means responsive to the reception of the alarm signal by the emergency supervising equipment prior to detection of said response indicating signal for triggering a fault indicator.
Claim 10
Dependent Claim
142 words
The emergency supervising equipment of claim 7, wherein said simulated incoming call signal applying means comprises a first relay means (P) for connecting said incoming trunk to a d.c. reference potential, at a first polarity, said detecting means comprises a parallel circuit including a first diode serially connected to a second relay means (M) in parallel with a second diode serially connected to a third relay means (L), said second relay means (M) being de-energized and said third relay means (L) being energized in response to said response indicating signal, said third relay means (L) including means (l0) for de-energizing said first relay means (P) in response to energization of said third relay means, said means for triggering comprising a fourth relay means (J) energized in response to said alarm signal arriving prior to the de-energization of said first relay means (P).
Claim 11
Dependent Claim
40 words
The emergency supervising equipment of claim 8, further including emergency condition resetting means, responsive to the energization of said fourth relay means (J), for causing the switching system to switch to a state restoring proper operation of the switching system.
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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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |