HK50087A - Line circuit testing - Google Patents
Line circuit testingInfo
- Publication number
- HK50087A HK50087A HK500/87A HK50087A HK50087A HK 50087 A HK50087 A HK 50087A HK 500/87 A HK500/87 A HK 500/87A HK 50087 A HK50087 A HK 50087A HK 50087 A HK50087 A HK 50087A
- Authority
- HK
- Hong Kong
- Prior art keywords
- line circuit
- circuit testing
- testing
- line
- circuit
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/24—Testing correct operation
- H04L1/242—Testing correct operation by comparing a transmitted test signal with a locally generated replica
- H04L1/243—Testing correct operation by comparing a transmitted test signal with a locally generated replica at the transmitter, using a loop-back
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
- H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
- H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
- H04M3/301—Circuit arrangements at the subscriber's side of the line
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
- H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
- H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
- H04M3/302—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop using modulation techniques for copper pairs
- H04M3/303—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop using modulation techniques for copper pairs and using PCM multiplexers, e.g. pair gain systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08120910A GB2101751B (en) | 1981-07-07 | 1981-07-07 | Line circuit testing. |
Publications (1)
Publication Number | Publication Date |
---|---|
HK50087A true HK50087A (en) | 1987-07-03 |
Family
ID=10523065
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HK500/87A HK50087A (en) | 1981-07-07 | 1987-06-25 | Line circuit testing |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE893781A (en) |
GB (1) | GB2101751B (en) |
HK (1) | HK50087A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3723115C1 (en) * | 1987-07-13 | 1989-03-16 | Telefonbau & Normalzeit Gmbh | Test and measuring device for digital signals |
SE501021C2 (en) * | 1993-04-01 | 1994-10-24 | Ericsson Telefon Ab L M | Device for testing line connections at telephone exchange |
-
1981
- 1981-07-07 GB GB08120910A patent/GB2101751B/en not_active Expired
-
1982
- 1982-07-07 BE BE2/59768A patent/BE893781A/en not_active IP Right Cessation
-
1987
- 1987-06-25 HK HK500/87A patent/HK50087A/en unknown
Also Published As
Publication number | Publication date |
---|---|
GB2101751A (en) | 1983-01-19 |
GB2101751B (en) | 1985-01-03 |
BE893781A (en) | 1983-01-07 |
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