SE407319B - Halvekosperr vid telefonsystem - Google Patents
Halvekosperr vid telefonsystemInfo
- Publication number
- SE407319B SE407319B SE7415394A SE7415394A SE407319B SE 407319 B SE407319 B SE 407319B SE 7415394 A SE7415394 A SE 7415394A SE 7415394 A SE7415394 A SE 7415394A SE 407319 B SE407319 B SE 407319B
- Authority
- SE
- Sweden
- Prior art keywords
- coster
- telephone system
- telephone
- half coster
- Prior art date
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Telephonic Communication Services (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7343928A FR2254159A1 (en) | 1973-12-10 | 1973-12-10 | Echo suppressor for terminal station - designed for four-wire telephone line with transmission cct. having controllable gate |
FR7437705A FR2291653A2 (fr) | 1974-11-15 | 1974-11-15 | Demi-suppresseur d'echo pour un terminal d'une ligne electrique a quatre fils |
Publications (2)
Publication Number | Publication Date |
---|---|
SE7415394L SE7415394L (xx) | 1975-06-11 |
SE407319B true SE407319B (sv) | 1979-03-19 |
Family
ID=26218070
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7415394A SE407319B (sv) | 1973-12-10 | 1974-12-09 | Halvekosperr vid telefonsystem |
Country Status (7)
Country | Link |
---|---|
US (1) | US3985979A (xx) |
JP (1) | JPS5433086B2 (xx) |
DE (1) | DE2457876C3 (xx) |
GB (1) | GB1477413A (xx) |
IT (1) | IT1030881B (xx) |
NL (1) | NL7416090A (xx) |
SE (1) | SE407319B (xx) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2363247A1 (fr) * | 1976-08-24 | 1978-03-24 | Cit Alcatel | Equipement terminal pour un systeme multiplex telephonique a courants porteurs |
FR2404969A1 (fr) * | 1977-10-03 | 1979-04-27 | Cit Alcatel | Demi-suppresseur d'echo pour une ligne telephonique a quatre fils |
US4165449A (en) * | 1978-01-03 | 1979-08-21 | Storage Technology Corporation | Echo suppressor circuit |
US4192979A (en) * | 1978-06-27 | 1980-03-11 | Communications Satellite Corporation | Apparatus for controlling echo in communication systems utilizing a voice-activated switch |
US4215252A (en) * | 1978-09-27 | 1980-07-29 | Communications Satellite Corporation | Video teleconference audio echo control unit |
CA1137240A (en) * | 1980-09-09 | 1982-12-07 | Northern Telecom Limited | Method of and apparatus for echo detection in voice channel signals |
GB2137055B (en) * | 1983-03-12 | 1986-11-12 | Marconi Avionics | Voice communication system |
GB2139054B (en) * | 1983-04-22 | 1986-09-24 | Gen Electric Co Plc | Loudspeaking telephone instruments |
ES2113320B1 (es) * | 1996-05-30 | 1999-01-16 | Alcatel Standard Electrica | Dispositivo supresor del eco. |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3280274A (en) * | 1963-10-30 | 1966-10-18 | Bell Telephone Labor Inc | Echo suppressor for communication systems having extended transmission delays |
US3351720A (en) * | 1964-08-31 | 1967-11-07 | Bell Telephone Labor Inc | Echo suppressor for communication system having transmission delay |
DE1816153B2 (de) * | 1968-12-20 | 1971-04-15 | Schaltungsanordnung zur echounterdrueckung in einem sprech kreis auf einem vierdraht uebertragungssystem bei einem uebergang auf einen zweidrahtuebertragungsweg | |
US3673355A (en) * | 1970-09-02 | 1972-06-27 | Bell Telephone Labor Inc | Common control digital echo suppression |
US3896273A (en) * | 1971-01-08 | 1975-07-22 | Communications Satellite Corp | Digital echo suppressor |
US3823275A (en) * | 1972-08-10 | 1974-07-09 | Bell Telephone Labor Inc | Common control digital echo suppressor |
-
1974
- 1974-12-06 IT IT30250/74A patent/IT1030881B/it active
- 1974-12-06 DE DE2457876A patent/DE2457876C3/de not_active Expired
- 1974-12-09 GB GB5322574A patent/GB1477413A/en not_active Expired
- 1974-12-09 SE SE7415394A patent/SE407319B/xx not_active IP Right Cessation
- 1974-12-10 NL NL7416090A patent/NL7416090A/xx unknown
- 1974-12-10 US US05/531,405 patent/US3985979A/en not_active Expired - Lifetime
- 1974-12-10 JP JP14123174A patent/JPS5433086B2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
SE7415394L (xx) | 1975-06-11 |
US3985979A (en) | 1976-10-12 |
GB1477413A (en) | 1977-06-22 |
JPS5092014A (xx) | 1975-07-23 |
DE2457876A1 (de) | 1975-06-12 |
IT1030881B (it) | 1979-04-10 |
DE2457876B2 (de) | 1980-08-14 |
JPS5433086B2 (xx) | 1979-10-18 |
DE2457876C3 (de) | 1981-06-04 |
NL7416090A (nl) | 1975-06-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |
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