GB1031448A - Improvements in or relating to line-testing systems for telecommunications systems - Google Patents
Improvements in or relating to line-testing systems for telecommunications systemsInfo
- Publication number
- GB1031448A GB1031448A GB3657464A GB3657464A GB1031448A GB 1031448 A GB1031448 A GB 1031448A GB 3657464 A GB3657464 A GB 3657464A GB 3657464 A GB3657464 A GB 3657464A GB 1031448 A GB1031448 A GB 1031448A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coupling
- line
- lines
- pulses
- repeaters
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
- F04B39/041—Measures to avoid lubricant contaminating the pumped fluid sealing for a reciprocating rod
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/40—Monitoring; Testing of relay systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/40—Monitoring; Testing of relay systems
- H04B17/401—Monitoring; Testing of relay systems with selective localization
- H04B17/402—Monitoring; Testing of relay systems with selective localization using different frequencies
- H04B17/404—Monitoring; Testing of relay systems with selective localization using different frequencies selected by local filters
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
1,031,448. Supervising unattended repeaters. SIEMENS & HALSKE A.G. Sept. 7, 1964 [Sept. 6, 1963], No. 36574/64. Heading H4R. [Also in Divisions G1 and G4] In a transmission system having separate lines for go and return paths in which the lines are interconnected by a series of couplings at a series of mutually spaced positions along the lines, e.g. at unattended repeater positions, and a pulse applied to the go line at a terminal station is passed to the return line through each of the couplings and received back at the terminal station as a series of pulses spaced by the transit time of the pulses from one coupling to the next, a transmission property of each coupling is variable in response to a fault criterion in a section of the line adjacent to that coupling. Preferably the pulses applied to the line for fault-finding occupy a frequency band adjacent to that used for the information transmission, the repeaters passing both bands, and the coupling networks, which are coupled to the lines by high impedance networks, include band-pass filters passing only the band occupied by the test pulses. The transmission property of the coupling, e.g. the attenuation, may be varied to indicate faults in the repeater itself or in the line. For example, by a manometric pressure dependent contact across the input or output of the coupling network a leak in the cable may be located. In such an arrangement the operation of the contact may be arranged to send a signal, common to all repeaters, to initiate the pulse-testing arrangement.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES87154A DE1188120B (en) | 1957-09-06 | 1963-09-06 | Message transmission method with coupling devices arranged at intervals along the transmission path |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1031448A true GB1031448A (en) | 1966-06-02 |
Family
ID=7513538
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3657464A Expired GB1031448A (en) | 1963-09-06 | 1964-09-07 | Improvements in or relating to line-testing systems for telecommunications systems |
Country Status (3)
Country | Link |
---|---|
GB (1) | GB1031448A (en) |
NL (1) | NL138906B (en) |
SE (1) | SE307164B (en) |
-
1964
- 1964-09-01 NL NL6410167A patent/NL138906B/en unknown
- 1964-09-04 SE SE1066364A patent/SE307164B/xx unknown
- 1964-09-07 GB GB3657464A patent/GB1031448A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL138906B (en) | 1973-05-15 |
SE307164B (en) | 1968-12-23 |
NL6410167A (en) | 1965-03-08 |
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