JPS4826406A - - Google Patents
Info
- Publication number
- JPS4826406A JPS4826406A JP6863872A JP6863872A JPS4826406A JP S4826406 A JPS4826406 A JP S4826406A JP 6863872 A JP6863872 A JP 6863872A JP 6863872 A JP6863872 A JP 6863872A JP S4826406 A JPS4826406 A JP S4826406A
- Authority
- JP
- Japan
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Dc Digital Transmission (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Bidirectional Digital Transmission (AREA)
- Communication Control (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17042871A | 1971-08-10 | 1971-08-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4826406A true JPS4826406A (en:Method) | 1973-04-07 |
| JPS5528449B2 JPS5528449B2 (en:Method) | 1980-07-28 |
Family
ID=22619815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6863872A Expired JPS5528449B2 (en:Method) | 1971-08-10 | 1972-07-08 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3743938A (en:Method) |
| JP (1) | JPS5528449B2 (en:Method) |
| BE (1) | BE787359A (en:Method) |
| CA (1) | CA951381A (en:Method) |
| DE (1) | DE2231869C3 (en:Method) |
| FR (1) | FR2150020A5 (en:Method) |
| GB (1) | GB1399659A (en:Method) |
| IT (1) | IT959320B (en:Method) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5320707A (en) * | 1976-08-10 | 1978-02-25 | Nippon Telegr & Teleph Corp <Ntt> | Automatic return system for subscriber line base band transmission system |
| JPS54159105A (en) * | 1978-06-07 | 1979-12-15 | Hitachi Ltd | Multiple signal-distribution unit |
| JPS59222943A (ja) * | 1983-06-01 | 1984-12-14 | Hitachi Ltd | 半導体装置 |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3952163A (en) * | 1972-04-24 | 1976-04-20 | General Datacomm Industries, Inc. | Method and apparatus for testing in FDM system |
| US4039751A (en) * | 1972-04-24 | 1977-08-02 | General Datacomm Industries, Inc. | Method and apparatus for closed loop testing of first and second modulators and demodulators |
| DE2240218B2 (de) * | 1972-08-16 | 1977-05-18 | TEKA DE Feiten & Guilleaume Fernmeldeanlagen GmbH, 500 Nürnberg | Ueberwachungseinrichtung fuer ein pulscodemodulationssystem |
| DE2422504B2 (de) * | 1974-05-09 | 1977-09-29 | TE KA DE Feiten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg | Nachrichtenuebertragungssystem |
| US4004097A (en) * | 1975-01-03 | 1977-01-18 | Badger Meter, Inc. | Automatic meter reading device |
| DE2530633C3 (de) * | 1975-07-09 | 1979-04-05 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Verfahren zur automatischen Überprüfung der Funktionstüchtigkeit von Datenübertragungssystemen |
| US4055808A (en) * | 1976-05-20 | 1977-10-25 | Intertel, Inc. | Data communications network testing system |
| FR2365922A1 (fr) * | 1976-09-24 | 1978-04-21 | Materiel Telephonique | Unite de signalisation pour central telephonique |
| LU79451A1 (de) * | 1978-04-17 | 1978-09-28 | Cea Elektronik Automat Gmbh | Vorrichtung zum erkennen von fehlern in datenfernuebertragungsanlagen |
| DE2829076A1 (de) * | 1978-07-01 | 1980-01-10 | Tekade Felten & Guilleaume | Testanordnung fuer datenuebertragungsstrecken |
| DE2838816A1 (de) * | 1978-09-06 | 1980-03-20 | Tekade Felten & Guilleaume | Schleifentest fuer datenuebertragungsstrecken |
| US4402082A (en) * | 1980-10-31 | 1983-08-30 | Foster Wheeler Energy Corporation | Automatic line termination in distributed industrial process control system |
| US4498186A (en) * | 1980-10-10 | 1985-02-05 | At&T Bell Laboratories | Data set diagnostic system |
| JPS5842328A (ja) * | 1981-09-07 | 1983-03-11 | Hitachi Ltd | 遠隔折返し制御方式 |
| JPS58175335A (ja) * | 1982-04-07 | 1983-10-14 | Hitachi Ltd | ル−プ式デ−タ伝送システムのル−プバツク制御方法 |
| DE3371023D1 (en) * | 1983-06-30 | 1987-05-21 | Ibm | Interface module for telephone lines |
| US4977579A (en) * | 1984-06-14 | 1990-12-11 | The United States Of America As Represented By The Secretary Of The Navy | Test set for a navigational satellite receiver |
| JPS61264852A (ja) * | 1985-05-20 | 1986-11-22 | Fujitsu Ltd | ディジタル加入者線試験方式 |
| JPH04315246A (ja) * | 1991-04-15 | 1992-11-06 | Mitsubishi Electric Corp | 半導体集積回路装置 |
| US5463633A (en) * | 1994-02-22 | 1995-10-31 | Rockwell International Corporation | Use of at commands to test modem with HP3065 |
| FR2731309A1 (fr) * | 1995-03-01 | 1996-09-06 | Trt Telecom Radio Electr | Systeme de controle d'une chaine de transmission |
| DE102004039061A1 (de) * | 2004-08-11 | 2006-02-23 | BSH Bosch und Siemens Hausgeräte GmbH | Schaltungsanordnung zur Unterdrückung von Störsignalen im Empfangszweig eines Modems eines Hausgerätes |
| DE102004039396A1 (de) * | 2004-08-13 | 2006-02-23 | BSH Bosch und Siemens Hausgeräte GmbH | Schaltungsanordnung zur Unterdrückung von Störsignalen im Empfangszweig eines Modems eines Hausgerätes |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2840797A (en) * | 1952-08-14 | 1958-06-24 | Westinghouse Electric Corp | Supervisory control systems and apparatus |
| US2864943A (en) * | 1954-02-24 | 1958-12-16 | Motorola Inc | Central station interrogation via relays of unattended data satellites which answer back |
| US3655915A (en) * | 1970-05-07 | 1972-04-11 | Gen Datacomm Ind Inc | Closed loop test method and apparatus for duplex data transmission modem |
-
1971
- 1971-08-10 US US00170428A patent/US3743938A/en not_active Expired - Lifetime
-
1972
- 1972-05-31 CA CA143,560,A patent/CA951381A/en not_active Expired
- 1972-06-08 GB GB2668972A patent/GB1399659A/en not_active Expired
- 1972-06-16 IT IT68950/72A patent/IT959320B/it active
- 1972-06-29 DE DE2231869A patent/DE2231869C3/de not_active Expired
- 1972-07-08 JP JP6863872A patent/JPS5528449B2/ja not_active Expired
- 1972-08-09 FR FR7228769A patent/FR2150020A5/fr not_active Expired
- 1972-08-09 BE BE787359D patent/BE787359A/xx unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5320707A (en) * | 1976-08-10 | 1978-02-25 | Nippon Telegr & Teleph Corp <Ntt> | Automatic return system for subscriber line base band transmission system |
| JPS54159105A (en) * | 1978-06-07 | 1979-12-15 | Hitachi Ltd | Multiple signal-distribution unit |
| JPS59222943A (ja) * | 1983-06-01 | 1984-12-14 | Hitachi Ltd | 半導体装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| CA951381A (en) | 1974-07-16 |
| DE2231869C3 (de) | 1981-06-19 |
| JPS5528449B2 (en:Method) | 1980-07-28 |
| BE787359A (fr) | 1973-02-09 |
| US3743938A (en) | 1973-07-03 |
| DE2231869B2 (de) | 1980-08-28 |
| DE2231869A1 (de) | 1973-02-15 |
| GB1399659A (en) | 1975-07-02 |
| IT959320B (it) | 1973-11-10 |
| FR2150020A5 (en:Method) | 1973-03-30 |