JPS6228899B2 - - Google Patents
Info
- Publication number
- JPS6228899B2 JPS6228899B2 JP1209080A JP1209080A JPS6228899B2 JP S6228899 B2 JPS6228899 B2 JP S6228899B2 JP 1209080 A JP1209080 A JP 1209080A JP 1209080 A JP1209080 A JP 1209080A JP S6228899 B2 JPS6228899 B2 JP S6228899B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- test
- input terminal
- receiving
- 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 111
- 230000005540 biological transmission Effects 0.000 claims description 44
- 239000002131 composite material Substances 0.000 claims description 5
- 230000007547 defect Effects 0.000 description 10
- 230000004044 response Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000004804 winding Methods 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
- H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7902903A FR2448258A1 (fr) | 1979-02-05 | 1979-02-05 | Systeme de test d'un dispositif muni d'un annuleur d'echo |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55104151A JPS55104151A (en) | 1980-08-09 |
| JPS6228899B2 true JPS6228899B2 (US20030199744A1-20031023-C00003.png) | 1987-06-23 |
Family
ID=9221610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1209080A Granted JPS55104151A (en) | 1979-02-05 | 1980-02-05 | Testing circuit |
Country Status (7)
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02503211A (ja) * | 1987-04-15 | 1990-10-04 | シユンドス・デフイブラトール・アクテイエボラーグ | 繊維パルプの製造方法及び製造装置 |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE434789B (sv) * | 1982-12-21 | 1984-08-13 | Ellemtel Utvecklings Ab | Forfarande for detektering av farliga linjespenningar over en tvatradig linje |
| SE441052B (sv) * | 1984-02-01 | 1985-09-02 | Ellemtel Utvecklings Ab | Forfarande for att testa funktionen hos en anordning for adaptiv ekoeliminering |
| EP0156315B1 (de) * | 1984-03-30 | 1991-06-05 | Siemens Aktiengesellschaft | Schaltungsanordnung zum Prüfen der Funktionsfähigkeit einer Datenübertragunseinrichtung |
| JPS6239924A (ja) * | 1985-08-16 | 1987-02-20 | Nec Corp | デ−タ伝送装置 |
| US4825459A (en) * | 1985-12-30 | 1989-04-25 | American Telephone And Telegraph Company | Local loop test arrangement in an echo canceller based full duplex modem |
| ES2037147T3 (es) * | 1987-07-16 | 1993-06-16 | Siemens Aktiengesellschaft | Instalacion de prueba para compensadores digitales de ecos. |
| NL8701750A (nl) * | 1987-07-24 | 1989-02-16 | At & T & Philips Telecomm | Zend-ontvanginrichting voor vol-duplex datatransmissie met een echocompensator en testvoorzieningen. |
| JP2580669B2 (ja) * | 1988-01-26 | 1997-02-12 | 日本電気株式会社 | 折返し試験回路 |
| DE3908284C1 (en) * | 1989-03-14 | 1990-06-07 | Siemens Ag, 1000 Berlin Und 8000 Muenchen, De | Test device for checking the cancelling function of a digital echo canceller |
| JP2745694B2 (ja) * | 1989-06-27 | 1998-04-28 | 日本電気株式会社 | 双方向バス伝送方式 |
| FR2674076A1 (fr) * | 1991-03-14 | 1992-09-18 | Bull Sa | Circuit integre a impedances asservies et application aux emetteurs-recepteurs notamment pour la communication entre unites d'un systeme informatique. |
| FR2674082B1 (fr) * | 1991-03-14 | 1994-11-25 | Bull Sa | Procedes de test pour transmissions serie bidirectionnelles et circuits pour leur mise en óoeuvre. |
| US5267300A (en) * | 1991-10-07 | 1993-11-30 | Racal-Datacom, Inc. | High speed digital data transmission over switched voice network |
| JP2763990B2 (ja) * | 1992-08-12 | 1998-06-11 | 富士通株式会社 | ２線式全二重モデム |
| US6011783A (en) * | 1997-06-11 | 2000-01-04 | Nortel Networks Corporation | Method and apparatus for monitoring echo cancellation performance within a telephone communications network |
| KR19990075508A (ko) * | 1998-03-20 | 1999-10-15 | 김영환 | 반향제거기 시험을 위한 펄스부호변조 데이터 지연장치 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3647993A (en) * | 1970-05-18 | 1972-03-07 | Wescom | Tone disabler |
| US3721958A (en) * | 1971-04-30 | 1973-03-20 | Gen Electric | Testing arrangement for a data communication system |
| US3783194A (en) * | 1972-11-20 | 1974-01-01 | Milgo Electronic Corp | Data modem having a fast turn-around time over direct distance dialed networks |
| NL170688C (nl) * | 1976-06-28 | 1982-12-01 | Philips Nv | Inrichting voor simultane tweerichtingsdatatransmissie over tweedraadsverbindingen. |
| NL7800408A (nl) * | 1977-01-17 | 1978-07-19 | Trt Telecom Radio Electr | Digitale echocompensator voor een modem voor datatransmissie met behulp van modulatie van een draaggolf. |
| FR2386202A1 (fr) * | 1977-03-31 | 1978-10-27 | Cit Alcatel | Dispositif de test en local pour un equipement de transmission de donnees duplex |
-
1979
- 1979-02-05 FR FR7902903A patent/FR2448258A1/fr active Granted
-
1980
- 1980-01-29 DE DE8080200079T patent/DE3060426D1/de not_active Expired
- 1980-01-29 EP EP80200079A patent/EP0014505B1/fr not_active Expired
- 1980-01-31 CA CA000344859A patent/CA1144999A/en not_active Expired
- 1980-02-01 AU AU55143/80A patent/AU530523B2/en not_active Ceased
- 1980-02-05 JP JP1209080A patent/JPS55104151A/ja active Granted
-
1983
- 1983-07-18 US US06/514,540 patent/US4549049A/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02503211A (ja) * | 1987-04-15 | 1990-10-04 | シユンドス・デフイブラトール・アクテイエボラーグ | 繊維パルプの製造方法及び製造装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0014505A1 (fr) | 1980-08-20 |
| CA1144999A (en) | 1983-04-19 |
| DE3060426D1 (en) | 1982-07-08 |
| FR2448258A1 (fr) | 1980-08-29 |
| AU530523B2 (en) | 1983-07-21 |
| US4549049A (en) | 1985-10-22 |
| FR2448258B1 (US20030199744A1-20031023-C00003.png) | 1982-01-08 |
| EP0014505B1 (fr) | 1982-05-19 |
| AU5514380A (en) | 1980-08-14 |
| JPS55104151A (en) | 1980-08-09 |
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| JPS6228899B2 (US20030199744A1-20031023-C00003.png) | ||
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |