FR2437757B2 - - Google Patents
Info
- Publication number
- FR2437757B2 FR2437757B2 FR7827762A FR7827762A FR2437757B2 FR 2437757 B2 FR2437757 B2 FR 2437757B2 FR 7827762 A FR7827762 A FR 7827762A FR 7827762 A FR7827762 A FR 7827762A FR 2437757 B2 FR2437757 B2 FR 2437757B2
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/001—Current supply source at the exchanger providing current to substations
- H04M19/005—Feeding arrangements without the use of line transformers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Devices For Supply Of Signal Current (AREA)
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7827762A FR2437757A2 (fr) | 1978-06-26 | 1978-09-28 | Joncteur d'abonne destine a assurer un couplage en deux fils ou quatre fils avec un central telephonique |
| CA000330330A CA1137666A (en) | 1978-06-26 | 1979-06-21 | Connecting circuit for a telephone line |
| DE2925000A DE2925000C2 (de) | 1978-06-26 | 1979-06-21 | Teilnehmerschaltung |
| SE7905480A SE437320B (sv) | 1978-06-26 | 1979-06-21 | Abonnentkoppling for anslutning av en telefonledning till en telefonvexel |
| GB7921834A GB2024564B (en) | 1978-06-26 | 1979-06-22 | Connecting circuit for a telephone line |
| CH5877/79A CH648170A5 (de) | 1978-06-26 | 1979-06-22 | Fernsprech-leitungsschaltung. |
| US06/051,084 US4275277A (en) | 1978-06-26 | 1979-06-22 | Subscriber line interface circuit for a telephone line |
| BE0/195949A BE877247A (fr) | 1978-06-26 | 1979-06-25 | Aansluitschakeling voor een telefoonlijn |
| AU48358/79A AU521488B2 (en) | 1978-06-26 | 1979-06-25 | Connecting circuit for telephone line |
| JP54080070A JPS6030468B2 (ja) | 1978-06-26 | 1979-06-25 | 加入者回路 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7818960A FR2430153A1 (fr) | 1978-06-26 | 1978-06-26 | Joncteur d'abonne destine a assurer sans transformateur un couplage deux fils-quatre fils |
| FR7827762A FR2437757A2 (fr) | 1978-06-26 | 1978-09-28 | Joncteur d'abonne destine a assurer un couplage en deux fils ou quatre fils avec un central telephonique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2437757A2 FR2437757A2 (fr) | 1980-04-25 |
| FR2437757B2 true FR2437757B2 ( ) | 1984-01-06 |
Family
ID=26220644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7827762A Granted FR2437757A2 (fr) | 1978-06-26 | 1978-09-28 | Joncteur d'abonne destine a assurer un couplage en deux fils ou quatre fils avec un central telephonique |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US4275277A ( ) |
| JP (1) | JPS6030468B2 ( ) |
| AU (1) | AU521488B2 ( ) |
| BE (1) | BE877247A ( ) |
| CA (1) | CA1137666A ( ) |
| CH (1) | CH648170A5 ( ) |
| DE (1) | DE2925000C2 ( ) |
| FR (1) | FR2437757A2 ( ) |
| GB (1) | GB2024564B ( ) |
| SE (1) | SE437320B ( ) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2460078B1 (fr) * | 1979-06-25 | 1986-12-12 | Trt Telecom Radio Electr | Joncteur d'abonne electronique |
| US4359609A (en) * | 1980-06-20 | 1982-11-16 | Advanced Micro Devices, Inc. | Circuit with feedback for controlling the impedance thereof |
| NL8004970A (nl) * | 1980-09-02 | 1982-04-01 | Philips Nv | Inrichting voor het uitwisselen van signalen tussen gescheiden schakelinginrichtingen. |
| NL8100242A (nl) * | 1981-01-20 | 1982-08-16 | Philips Nv | Overspanningsbeveiliging van een lijncircuit. |
| IT1211072B (it) * | 1981-06-30 | 1989-09-29 | Ates Componenti Elettron | Circuito raddrizzatore a ponte di transistori per uso telefonico. |
| GB2104330A (en) * | 1981-08-19 | 1983-03-02 | Texas Instruments Ltd | Improvements in or relating to amplifiers |
| CA1177985A (en) * | 1981-09-24 | 1984-11-13 | Don W. Zobel | Electronic terminator circuit |
| US4431874A (en) * | 1981-09-24 | 1984-02-14 | Motorola, Inc. | Balanced current multiplier circuit for a subscriber loop interface circuit |
| US4524246A (en) * | 1982-07-07 | 1985-06-18 | Harris Corporation | SLIC II--common-mode current rejection |
| US4665547A (en) * | 1984-11-02 | 1987-05-12 | At&T Company | Limiting amplifier for common mode feedback in telephone line feed circuits |
| IT1215254B (it) * | 1985-03-20 | 1990-01-31 | Ates Componenti Elettron | Circuito, integrabile monoliticamente, per la misura di correnti longitudinali e trasversali in una linea ditrasmissione bifilare. |
| IT1214603B (it) * | 1985-04-30 | 1990-01-18 | Ates Componenti Elettron | Circuito telefonico, integrabile monoliticamente, perl'alimentazione di una linea telefonica d'utente. |
| AU574277B2 (en) * | 1985-08-20 | 1988-06-30 | Fujitsu Limited | Subscriber line interface circuit |
| JPH0618396B2 (ja) * | 1989-07-03 | 1994-03-09 | ローム株式会社 | 電話機用電源回路 |
| US5175764A (en) * | 1990-10-18 | 1992-12-29 | Ag Communication Systems Corporation | Enhanced high voltage line interface circuit |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1583825A ( ) * | 1968-04-19 | 1969-12-05 | ||
| NL7208148A ( ) * | 1972-06-15 | 1973-12-18 | ||
| US4004109A (en) * | 1975-05-09 | 1977-01-18 | Boxall Frank S | Hybrid circuit |
| DE2556157C3 (de) * | 1975-12-11 | 1979-01-18 | Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin | Schaltungsanordnung für eine elektronische Teilnehmerspeisung |
| US4064377A (en) * | 1976-03-11 | 1977-12-20 | Wescom Switching, Inc. | Electronic hybrid and hybrid repeater |
| US4041252A (en) * | 1976-06-07 | 1977-08-09 | North Electric Company | Transformerless two-wire/four-wire hybrid with DC sourcing capability |
| US4142075A (en) * | 1977-10-11 | 1979-02-27 | Burr-Brown Research Corporation | Interface circuit and method for telephone extension lines |
-
1978
- 1978-09-28 FR FR7827762A patent/FR2437757A2/fr active Granted
-
1979
- 1979-06-21 DE DE2925000A patent/DE2925000C2/de not_active Expired
- 1979-06-21 SE SE7905480A patent/SE437320B/sv unknown
- 1979-06-21 CA CA000330330A patent/CA1137666A/en not_active Expired
- 1979-06-22 CH CH5877/79A patent/CH648170A5/de not_active IP Right Cessation
- 1979-06-22 US US06/051,084 patent/US4275277A/en not_active Expired - Lifetime
- 1979-06-22 GB GB7921834A patent/GB2024564B/en not_active Expired
- 1979-06-25 AU AU48358/79A patent/AU521488B2/en not_active Ceased
- 1979-06-25 BE BE0/195949A patent/BE877247A/xx not_active IP Right Cessation
- 1979-06-25 JP JP54080070A patent/JPS6030468B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| SE437320B (sv) | 1985-02-18 |
| BE877247A (fr) | 1979-12-27 |
| FR2437757A2 (fr) | 1980-04-25 |
| JPS555595A (en) | 1980-01-16 |
| DE2925000C2 (de) | 1984-03-22 |
| GB2024564A (en) | 1980-01-09 |
| JPS6030468B2 (ja) | 1985-07-16 |
| DE2925000A1 (de) | 1980-01-10 |
| SE7905480L (sv) | 1979-12-27 |
| US4275277A (en) | 1981-06-23 |
| AU521488B2 (en) | 1982-04-01 |
| CA1137666A (en) | 1982-12-14 |
| CH648170A5 (de) | 1985-02-28 |
| AU4835879A (en) | 1980-01-03 |
| GB2024564B (en) | 1982-06-09 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| TP | Transmission of property |