JPS5542495A - Device for measuring telephone line characteristics - Google Patents
Device for measuring telephone line characteristicsInfo
- Publication number
- JPS5542495A JPS5542495A JP11945979A JP11945979A JPS5542495A JP S5542495 A JPS5542495 A JP S5542495A JP 11945979 A JP11945979 A JP 11945979A JP 11945979 A JP11945979 A JP 11945979A JP S5542495 A JPS5542495 A JP S5542495A
- Authority
- JP
- Japan
- Prior art keywords
- telephone line
- line characteristics
- measuring
- measuring telephone
- telephone
- 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.)
- Granted
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)
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 true JPS5542495A (en) | 1980-03-25 |
JPS6322111B2 JPS6322111B2 (en) | 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 (en) |
AT (1) | AT384698B (en) |
CA (1) | CA1092653A (en) |
DE (1) | DE2936722A1 (en) |
FR (1) | FR2436999A1 (en) |
GB (1) | GB2031248B (en) |
NL (1) | NL7906671A (en) |
SE (1) | SE435775B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0744604B2 (en) * | 1985-05-17 | 1995-05-15 | 日本電気株式会社 | Subscriber line monitoring circuit |
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)
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 |
-
1978
- 1978-09-21 CA CA311,757A patent/CA1092653A/en not_active Expired
-
1979
- 1979-08-31 GB GB7930339A patent/GB2031248B/en not_active Expired
- 1979-09-06 NL NL7906671A patent/NL7906671A/en not_active Application Discontinuation
- 1979-09-11 DE DE19792936722 patent/DE2936722A1/en not_active Withdrawn
- 1979-09-14 AT AT0606579A patent/AT384698B/en not_active IP Right Cessation
- 1979-09-19 JP JP11945979A patent/JPS5542495A/en active Granted
- 1979-09-19 SE SE7907752A patent/SE435775B/en not_active IP Right Cessation
- 1979-09-20 FR FR7923477A patent/FR2436999A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
ATA606579A (en) | 1987-05-15 |
AT384698B (en) | 1987-12-28 |
GB2031248A (en) | 1980-04-16 |
SE7907752L (en) | 1980-03-22 |
JPS6322111B2 (en) | 1988-05-10 |
FR2436999A1 (en) | 1980-04-18 |
GB2031248B (en) | 1982-12-22 |
DE2936722A1 (en) | 1980-04-10 |
CA1092653A (en) | 1980-12-30 |
FR2436999B1 (en) | 1983-07-01 |
NL7906671A (en) | 1980-03-25 |
SE435775B (en) | 1984-10-15 |
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