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HK50087A - Line circuit testing - Google Patents

Line circuit testing

Info

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
Application number
HK500/87A
Inventor
Victor Teacher
Original Assignee
Stc Plc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Stc Plc filed Critical Stc Plc
Publication of HK50087A publication Critical patent/HK50087A/en

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)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
HK500/87A 1981-07-07 1987-06-25 Line circuit testing HK50087A (en)

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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
BE893781A (en) 1983-01-07
GB2101751B (en) 1985-01-03
GB2101751A (en) 1983-01-19

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