GB954225A - Improvements in or relating to security arrangements for electrical systems - Google Patents
Improvements in or relating to security arrangements for electrical systemsInfo
- Publication number
- GB954225A GB954225A GB3816860A GB3816860A GB954225A GB 954225 A GB954225 A GB 954225A GB 3816860 A GB3816860 A GB 3816860A GB 3816860 A GB3816860 A GB 3816860A GB 954225 A GB954225 A GB 954225A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fault
- units
- equipment
- unit
- faulty
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/08—Indicating faults in circuits or apparatus
- H04M3/12—Marking faulty circuits "busy"; Enabling equipment to disengage itself from faulty circuits ; Using redundant circuits; Response of a circuit, apparatus or system to an error
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Abstract
954,225. Automatic exchange systems. H.M. POSTMASTER GENERAL, STANDARD TELEPHONES & CABLES Ltd., GENERAL ELECTRIC CO. Ltd., AUTOMATIC TELEPHONE & ELECTRIC CO. Ltd., ASSOCIATED ELECTRICAL INDUSTRIES Ltd., and ERICSSON TELEPHONES Ltd. Nov. 1, 1961 [Nov. 7, 1960], No. 38168/60. Heading H4K. [Also in Division G1] In a set of interconnected interdependent electrical functional units in which a fault in one unit may affect the operation of another, fault finding is effected by automatically replacing units by like units in a predetermined sequence and automatically applying tests after each replacement. The invention may be applied to automatic telephone or telegraph exchange systems, or to computer and data processing systems generally. As shown, equipments A, B, C are interconnected in such manner that signals may pass both ways between A and B and between B and C and one way from A to C. Each equipment is provided with respective routine test equipments RA, RB, RC, under control of a fault analyser FA. When a routiner reports a fault, FA resets all the routiners and initiates a systematic replacement of such of the units A, B, C as could be responsible for the fault report, and in an order determined by fault reported. Thus suppose RA reports a fault which could be due to the malfunction of A or B. Then FA initiates replacement of unit A and the routiner RA is restarted. If the fault is no longer reported then unit A is indicated as faulty and the operation stopped. If, however, the fault still shows up then the routiners are reset, unit B is replaced, and a further routine test is conducted. Detailed circuitry for the equipment FA is provided, Fig. 2 (not shown), wherein different sequences are provided according to the nature of the reported fault. In a second embodiment, the equipments and their replacements are switched in, in all possible combinations, and an analysis of the fault reports made to indicate which units are faulty, and also to select a trouble-free combination for operational use. As shown. Fig. 3, a transmission path may pass either through equipment WA or SA and either through equipment WB or SB. Thus the control equipment, Fig. 4 (not shown), opens gates TG1 or TG3 and TG2 or TG4 in successive combinations for each of which a routine test is carried out and the result staticized. At the end of the cycle the staticized results are fed to gate combinations to indicate the faulty units, and used to enable appropriate ones of the gates TG1 . . . TG4 to provide an operational path. Specifications 940,016 and 954,226 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3816860A GB954225A (en) | 1960-11-07 | 1960-11-07 | Improvements in or relating to security arrangements for electrical systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3816860A GB954225A (en) | 1960-11-07 | 1960-11-07 | Improvements in or relating to security arrangements for electrical systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB954225A true GB954225A (en) | 1964-04-02 |
Family
ID=10401691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3816860A Expired GB954225A (en) | 1960-11-07 | 1960-11-07 | Improvements in or relating to security arrangements for electrical systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB954225A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3409877A (en) * | 1964-11-27 | 1968-11-05 | Bell Telephone Labor Inc | Automatic maintenance arrangement for data processing systems |
-
1960
- 1960-11-07 GB GB3816860A patent/GB954225A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3409877A (en) * | 1964-11-27 | 1968-11-05 | Bell Telephone Labor Inc | Automatic maintenance arrangement for data processing systems |
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