FR2251975A1 - - Google Patents
Info
- Publication number
- FR2251975A1 FR2251975A1 FR7340850A FR7340850A FR2251975A1 FR 2251975 A1 FR2251975 A1 FR 2251975A1 FR 7340850 A FR7340850 A FR 7340850A FR 7340850 A FR7340850 A FR 7340850A FR 2251975 A1 FR2251975 A1 FR 2251975A1
- Authority
- FR
- France
- 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
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/0096—Trunk circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7340850A FR2251975B1 (en) | 1973-11-16 | 1973-11-16 | |
ZA00747128A ZA747128B (en) | 1973-11-16 | 1974-11-06 | Electronic trunk junctor |
DE2453094A DE2453094B2 (en) | 1973-11-16 | 1974-11-08 | Electronic connection kit |
GB4886074A GB1452386A (en) | 1973-11-16 | 1974-11-12 | Electronic trunk junctor |
CH1524474A CH596727A5 (en) | 1973-11-16 | 1974-11-15 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7340850A FR2251975B1 (en) | 1973-11-16 | 1973-11-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2251975A1 true FR2251975A1 (en) | 1975-06-13 |
FR2251975B1 FR2251975B1 (en) | 1979-08-03 |
Family
ID=9127862
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7340850A Expired FR2251975B1 (en) | 1973-11-16 | 1973-11-16 |
Country Status (5)
Country | Link |
---|---|
CH (1) | CH596727A5 (en) |
DE (1) | DE2453094B2 (en) |
FR (1) | FR2251975B1 (en) |
GB (1) | GB1452386A (en) |
ZA (1) | ZA747128B (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2326100A1 (en) * | 1975-09-26 | 1977-04-22 | Ericsson Telefon Ab L M | Junction network for electronic telephone installation - comprises electronic elements compatible with logic circuits to eliminate relay noise |
FR2372563A1 (en) * | 1976-11-25 | 1978-06-23 | Ericsson Telefon Ab L M | Telephone network exchange junction - includes detection coils and current detectors and switches in line branches from two-core cable |
EP0010720A1 (en) * | 1978-10-27 | 1980-05-14 | Siemens Aktiengesellschaft | Fully electronic loop closure circuit |
FR2500975A1 (en) * | 1981-02-27 | 1982-09-03 | Cit Alcatel | Inductive circuit for matching in telecommunications network - uses opto-electronic coupling to isolate control signals from multiplexer driving measuring circuit |
FR2530105A1 (en) * | 1982-07-07 | 1984-01-13 | Constr Telephoniques | LOOP CIRCUIT FOR TELEPHONE LINE |
FR2544144A1 (en) * | 1983-04-11 | 1984-10-12 | Rosny Unite Tech | MODULATOR RELAYS, ESPECIALLY FOR TELECOMMUNICATIONS INSTALLATIONS |
FR2546351A1 (en) * | 1983-05-18 | 1984-11-23 | Telecommunications Sa | LINE CIRCUIT FOR NETWORK JUMPER |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1123131A (en) * | 1978-02-28 | 1982-05-04 | Michael C.J. Cowpland | Transformerless trunk circuit |
CH635216A5 (en) * | 1978-10-25 | 1983-03-15 | Hansjoerg Erne | DEVICE FOR MONITORING THE LINE CURRENT IN A TELEPHONE LINE. |
DE3322642A1 (en) * | 1983-06-23 | 1985-01-24 | Siemens AG, 1000 Berlin und 8000 München | Hybrid circuit for telephone stations with amplifiers |
DE3407202A1 (en) * | 1984-02-28 | 1985-08-29 | Siemens AG, 1000 Berlin und 8000 München | Circuit arrangement for an electronic choke in loudspeaker telephone stations |
DE3407226A1 (en) * | 1984-02-28 | 1985-08-29 | Siemens AG, 1000 Berlin und 8000 München | Circuit arrangement for an electronic choke in loudspeaker telephone stations |
DE3604491A1 (en) * | 1986-02-13 | 1987-08-20 | Gaertner Karl Telegaertner | Device with bistable relay |
DE3804216A1 (en) * | 1988-02-11 | 1989-08-24 | Telefonbau & Normalzeit Gmbh | CIRCUIT ARRANGEMENT FOR EXTERNAL LINE TRANSMISSION OF COMMUNICATION SWITCHING SYSTEMS, ESPECIALLY TELEPHONE EXTENSION SYSTEMS |
GB2220820B (en) * | 1988-07-13 | 1992-07-08 | Philips Electronic Associated | Telephone line loop current regulator |
DE4337530A1 (en) * | 1993-11-04 | 1995-05-11 | Bergermann Petra | Module for connecting devices to the public telephone network |
CN101729699B (en) | 2008-10-25 | 2012-02-01 | 华为技术有限公司 | Separation equipment and method for transmitting voice signal |
-
1973
- 1973-11-16 FR FR7340850A patent/FR2251975B1/fr not_active Expired
-
1974
- 1974-11-06 ZA ZA00747128A patent/ZA747128B/en unknown
- 1974-11-08 DE DE2453094A patent/DE2453094B2/en not_active Withdrawn
- 1974-11-12 GB GB4886074A patent/GB1452386A/en not_active Expired
- 1974-11-15 CH CH1524474A patent/CH596727A5/xx not_active IP Right Cessation
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2326100A1 (en) * | 1975-09-26 | 1977-04-22 | Ericsson Telefon Ab L M | Junction network for electronic telephone installation - comprises electronic elements compatible with logic circuits to eliminate relay noise |
FR2372563A1 (en) * | 1976-11-25 | 1978-06-23 | Ericsson Telefon Ab L M | Telephone network exchange junction - includes detection coils and current detectors and switches in line branches from two-core cable |
EP0010720A1 (en) * | 1978-10-27 | 1980-05-14 | Siemens Aktiengesellschaft | Fully electronic loop closure circuit |
FR2500975A1 (en) * | 1981-02-27 | 1982-09-03 | Cit Alcatel | Inductive circuit for matching in telecommunications network - uses opto-electronic coupling to isolate control signals from multiplexer driving measuring circuit |
EP0099272A3 (en) * | 1982-07-07 | 1984-11-07 | COMPAGNIE GENERALE DE CONSTRUCTIONS TELEPHONIQUES Société Anonyme dite: | Loop circuit for a telephone line |
FR2530105A1 (en) * | 1982-07-07 | 1984-01-13 | Constr Telephoniques | LOOP CIRCUIT FOR TELEPHONE LINE |
EP0099272A2 (en) * | 1982-07-07 | 1984-01-25 | COMPAGNIE GENERALE DE CONSTRUCTIONS TELEPHONIQUES Société Anonyme dite: | Loop circuit for a telephone line |
US4535202A (en) * | 1982-07-07 | 1985-08-13 | Compagnie Generale De Constructions Telephoniques | Loop-circuit for telephone line |
FR2544144A1 (en) * | 1983-04-11 | 1984-10-12 | Rosny Unite Tech | MODULATOR RELAYS, ESPECIALLY FOR TELECOMMUNICATIONS INSTALLATIONS |
EP0122852A1 (en) * | 1983-04-11 | 1984-10-24 | UNITE TECHNIQUE ROSNY, Société dite: | Modulating relay, particularly for telecommunication equipment |
FR2546351A1 (en) * | 1983-05-18 | 1984-11-23 | Telecommunications Sa | LINE CIRCUIT FOR NETWORK JUMPER |
EP0127517A1 (en) * | 1983-05-18 | 1984-12-05 | Societe Anonyme De Telecommunications (S.A.T.) | Junction circuit for an exchange trunk |
US4567329A (en) * | 1983-05-18 | 1986-01-28 | Societe Anonyme De Telecommunications | Line circuit for network junctor |
Also Published As
Publication number | Publication date |
---|---|
FR2251975B1 (en) | 1979-08-03 |
GB1452386A (en) | 1976-10-13 |
DE2453094B2 (en) | 1979-11-29 |
DE2453094A1 (en) | 1975-05-22 |
CH596727A5 (en) | 1978-03-15 |
ZA747128B (en) | 1975-11-26 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |