JPS6322111B2 - - Google Patents

Info

Publication number
JPS6322111B2
JPS6322111B2 JP54119459A JP11945979A JPS6322111B2 JP S6322111 B2 JPS6322111 B2 JP S6322111B2 JP 54119459 A JP54119459 A JP 54119459A JP 11945979 A JP11945979 A JP 11945979A JP S6322111 B2 JPS6322111 B2 JP S6322111B2
Authority
JP
Japan
Prior art keywords
ring
chip
earth
spurious
ground
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
Application number
JP54119459A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5542495A (en
Inventor
Chaarusu Eruson Jon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of JPS5542495A publication Critical patent/JPS5542495A/ja
Publication of JPS6322111B2 publication Critical patent/JPS6322111B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
JP11945979A 1978-09-21 1979-09-19 Device for measuring telephone line characteristics Granted JPS5542495A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA311,757A CA1092653A (en) 1978-09-21 1978-09-21 Method and apparatus for measuring telephone line

Publications (2)

Publication Number Publication Date
JPS5542495A JPS5542495A (en) 1980-03-25
JPS6322111B2 true JPS6322111B2 (de) 1988-05-10

Family

ID=4112404

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11945979A Granted JPS5542495A (en) 1978-09-21 1979-09-19 Device for measuring telephone line characteristics

Country Status (8)

Country Link
JP (1) JPS5542495A (de)
AT (1) AT384698B (de)
CA (1) CA1092653A (de)
DE (1) DE2936722A1 (de)
FR (1) FR2436999A1 (de)
GB (1) GB2031248B (de)
NL (1) NL7906671A (de)
SE (1) SE435775B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0744604B2 (ja) * 1985-05-17 1995-05-15 日本電気株式会社 加入者線監視回路
GB2269073B (en) * 1992-07-23 1996-06-19 Northern Telecom Ltd Remote line tester
GB9613287D0 (en) * 1996-06-25 1996-08-28 Raychem Ltd Ground testing

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4028507A (en) * 1976-06-28 1977-06-07 Bell Telephone Laboratories, Incorporated Apparatus for applying particular voltages to three-terminal circuits and measuring resulting current flows for the purpose of determining circuit characteristics

Also Published As

Publication number Publication date
NL7906671A (nl) 1980-03-25
GB2031248A (en) 1980-04-16
AT384698B (de) 1987-12-28
GB2031248B (en) 1982-12-22
SE435775B (sv) 1984-10-15
FR2436999A1 (fr) 1980-04-18
DE2936722A1 (de) 1980-04-10
ATA606579A (de) 1987-05-15
JPS5542495A (en) 1980-03-25
CA1092653A (en) 1980-12-30
FR2436999B1 (de) 1983-07-01
SE7907752L (sv) 1980-03-22

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