GB932109A - Improvements in or relating to electrical signalling systems - Google Patents
Improvements in or relating to electrical signalling systemsInfo
- Publication number
- GB932109A GB932109A GB1322361A GB1322361A GB932109A GB 932109 A GB932109 A GB 932109A GB 1322361 A GB1322361 A GB 1322361A GB 1322361 A GB1322361 A GB 1322361A GB 932109 A GB932109 A GB 932109A
- Authority
- GB
- United Kingdom
- Prior art keywords
- repeaters
- fault
- meter
- supervisory
- rectifier
- 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
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/40—Monitoring; Testing of relay systems
- H04B17/407—Monitoring; Testing of relay systems without selective localization
- H04B17/409—Monitoring; Testing of relay systems without selective localization by means of resistance, voltage or current measurement
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
932,109. Supervising unattended repeaters. BRITISH TELECOMMUNICATIONS RESEARCH Ltd. April 12, 1961, No. 13223/61. Addition to 914,788. Class 40 (4). In a carrier telecommunication system of the kind described in the parent Specification, some of the repeaters contain rectifiers in series with the resistors across the supervisory leads. A fault in the line between two repeaters e.g. AP1, AP2 causes relays B, C, D to drop out and thus causes contacts B2 to introduce a resistor RB2 of characteristic value and rectifier MR1 across supervisory leads B, D. A meter M1 is calibrated so that the approximate position of the fault can be read off directly but in order to localise it more exactly reversing switches RS1 and RS2 in the terminal station BN are operated manually and consequently the meter will now read zero since the rectifier is non-conducting in the reverse direction. If the fault had occurred between repeaters AP2, AP3 then reversal of the supervisory current would produce no change on the meter.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3776559A GB914788A (en) | 1961-04-12 | 1959-11-06 | Improvements in or relating to electrical signalling systems |
| GB1322361A GB932109A (en) | 1961-04-12 | 1961-04-12 | Improvements in or relating to electrical signalling systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1322361A GB932109A (en) | 1961-04-12 | 1961-04-12 | Improvements in or relating to electrical signalling systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB932109A true GB932109A (en) | 1963-07-24 |
Family
ID=10019060
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3776559A Expired GB914788A (en) | 1961-04-12 | 1959-11-06 | Improvements in or relating to electrical signalling systems |
| GB1322361A Expired GB932109A (en) | 1961-04-12 | 1961-04-12 | Improvements in or relating to electrical signalling systems |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3776559A Expired GB914788A (en) | 1961-04-12 | 1959-11-06 | Improvements in or relating to electrical signalling systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB914788A (en) |
-
1959
- 1959-11-06 GB GB3776559A patent/GB914788A/en not_active Expired
-
1961
- 1961-04-12 GB GB1322361A patent/GB932109A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB914788A (en) | 1963-01-02 |
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