JPS6361823B2 - - Google Patents
Info
- Publication number
- JPS6361823B2 JPS6361823B2 JP55051278A JP5127880A JPS6361823B2 JP S6361823 B2 JPS6361823 B2 JP S6361823B2 JP 55051278 A JP55051278 A JP 55051278A JP 5127880 A JP5127880 A JP 5127880A JP S6361823 B2 JPS6361823 B2 JP S6361823B2
- Authority
- JP
- Japan
- Prior art keywords
- digital
- subscriber
- signal
- circuit
- subscriber line
- 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
- 238000012360 testing method Methods 0.000 claims description 41
- 230000005540 biological transmission Effects 0.000 claims description 19
- 238000010998 test method Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
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
- 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)
- Monitoring And Testing Of Exchanges (AREA)
- Time-Division Multiplex Systems (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5127880A JPS56147548A (en) | 1980-04-17 | 1980-04-17 | Test method for digital subscriber line carrier system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5127880A JPS56147548A (en) | 1980-04-17 | 1980-04-17 | Test method for digital subscriber line carrier system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56147548A JPS56147548A (en) | 1981-11-16 |
JPS6361823B2 true JPS6361823B2 (US20100056889A1-20100304-C00004.png) | 1988-11-30 |
Family
ID=12882468
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5127880A Granted JPS56147548A (en) | 1980-04-17 | 1980-04-17 | Test method for digital subscriber line carrier system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56147548A (US20100056889A1-20100304-C00004.png) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0351903A (ja) * | 1989-07-19 | 1991-03-06 | Nec Ibaraki Ltd | パワーオンリセット監視回路 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0813065B2 (ja) * | 1986-05-02 | 1996-02-07 | 日本電気株式会社 | Isdn交換機試験方式 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5474616A (en) * | 1977-11-28 | 1979-06-14 | Nippon Telegr & Teleph Corp <Ntt> | Tester for digital incoming line |
JPS5474615A (en) * | 1977-11-28 | 1979-06-14 | Nippon Telegr & Teleph Corp <Ntt> | Test system for digital line |
-
1980
- 1980-04-17 JP JP5127880A patent/JPS56147548A/ja active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5474616A (en) * | 1977-11-28 | 1979-06-14 | Nippon Telegr & Teleph Corp <Ntt> | Tester for digital incoming line |
JPS5474615A (en) * | 1977-11-28 | 1979-06-14 | Nippon Telegr & Teleph Corp <Ntt> | Test system for digital line |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0351903A (ja) * | 1989-07-19 | 1991-03-06 | Nec Ibaraki Ltd | パワーオンリセット監視回路 |
Also Published As
Publication number | Publication date |
---|---|
JPS56147548A (en) | 1981-11-16 |
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