FR2427751A1 - Circuit de telephone electronique pour ligne d'abonne - Google Patents
Circuit de telephone electronique pour ligne d'abonneInfo
- Publication number
- FR2427751A1 FR2427751A1 FR7912965A FR7912965A FR2427751A1 FR 2427751 A1 FR2427751 A1 FR 2427751A1 FR 7912965 A FR7912965 A FR 7912965A FR 7912965 A FR7912965 A FR 7912965A FR 2427751 A1 FR2427751 A1 FR 2427751A1
- Authority
- FR
- France
- Prior art keywords
- subscriber line
- line
- electronic circuits
- voice frequency
- subscriber station
- 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.)
- Withdrawn
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)
Abstract
Ce circuit de ligne d'abonné présente une structure se prêtant à l'intégration et un équilibrage intrinsèque en courant alternatif à la fréquence vocale et une faible impédance en mode commun aux signaux parasites sur la ligne. Il comprend deux circuits électroniques capables de fournir au poste d'abonné le courant d'alimentation et de simuler l'impédance (résistance inductive et réactance) nécessaire pour éviter la propagation des signaux de fréquence vocale vers la source d'alimentation commune, ils sont capables de détecter les variations de courant sur la ligne dues à des critères de signalisation électriques en provenance du poste d'abonné; et deux comparateurs de seuil d'hystérèse, capables de détecter des variations de tension dans lesdits circuits électroniques et d'émettre des courants pilotes correspondants.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT68269/78A IT1159706B (it) | 1978-06-02 | 1978-06-02 | Circuito telefonico elettronico di linea d'utente |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2427751A1 true FR2427751A1 (fr) | 1979-12-28 |
Family
ID=11308779
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7912965A Withdrawn FR2427751A1 (fr) | 1978-06-02 | 1979-05-22 | Circuit de telephone electronique pour ligne d'abonne |
Country Status (12)
Country | Link |
---|---|
US (1) | US4287392A (fr) |
JP (1) | JPS5853542B2 (fr) |
BE (1) | BE876692A (fr) |
BR (1) | BR7903166A (fr) |
CA (1) | CA1114084A (fr) |
CH (1) | CH634703A5 (fr) |
DE (1) | DE2922271C2 (fr) |
FR (1) | FR2427751A1 (fr) |
GB (1) | GB2022363B (fr) |
IT (1) | IT1159706B (fr) |
NL (1) | NL7904313A (fr) |
SE (1) | SE7904735L (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2502434A1 (fr) * | 1981-03-20 | 1982-09-24 | Trt Telecom Radio Electr | Circuit pour reduire la consommation dans un equipement de ligne d'abonne en cas de faux appel |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4473719A (en) * | 1982-05-17 | 1984-09-25 | At&T Bell Laboratories | Switchhook status detector |
DE3237681C2 (de) * | 1982-10-12 | 1986-03-27 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Speiseschaltung für einen veränderlichen Verbraucherwiderstand und mit unterschiedlich wirkendem Ausgangswiderstand |
JPS59122053U (ja) * | 1983-02-03 | 1984-08-17 | エンネツ株式会社 | 植物栽培用加温機 |
US4558183A (en) * | 1983-10-03 | 1985-12-10 | Cellutron Corporation | Opto-coupler interfacing circuit |
GB2287155B (en) * | 1994-02-23 | 1998-08-12 | Motorola Inc | Telecommunications device |
CA2146596C (fr) * | 1994-04-29 | 1999-09-21 | Harry W. Moore, Iii | Detecteur de courant formant boucle |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3649769A (en) * | 1970-10-28 | 1972-03-14 | Gen Electric | Circuit for supplying direct current to a telephone line |
FR2216733A1 (fr) * | 1973-01-31 | 1974-08-30 | Labo Cent Telecommunicat | |
FR2254168A1 (en) * | 1973-12-11 | 1975-07-04 | Ass Ouvriers Instr Precision | Telephone line supply device - is an active electronic device acting as resistance for direct current and high impedance for A.C. |
US3955052A (en) * | 1974-11-18 | 1976-05-04 | Tadiran Israel Electronics Industries Ltd. | Subscriber unit particularly useful for time-division-multiplex system |
DE2608171A1 (de) * | 1975-02-28 | 1976-09-16 | Hitachi Ltd | Sprechweg-anordnung |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1199827B (de) * | 1964-05-21 | 1965-09-02 | Telefunken Patent | Schaltungsanordnung fuer die Speisung der Teilnehmerstellen in Fernmelde-, insbesondere Fernsprechanlagen |
US3410961A (en) * | 1965-10-12 | 1968-11-12 | Bell Telephone Labor Inc | Line circuit for a telephone system having optical solid state means |
CH586984A5 (fr) * | 1974-12-23 | 1977-04-15 | Ibm | |
JPS4950860A (fr) * | 1972-09-18 | 1974-05-17 | ||
US3783194A (en) * | 1972-11-20 | 1974-01-01 | Milgo Electronic Corp | Data modem having a fast turn-around time over direct distance dialed networks |
US3848094A (en) * | 1972-12-29 | 1974-11-12 | Stromberg Carlson Corp | Telephone battery feed circuit |
FR2254167B2 (fr) * | 1973-12-10 | 1978-08-18 | Labo Cent Telecommunicat | |
US3914556A (en) * | 1974-06-12 | 1975-10-21 | Itt | On-hook and off-hook detector for telephone switching systems |
DE2534609C3 (de) * | 1975-08-02 | 1978-05-18 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Schaltungsanordnung für die zentrale Speisung von Teilnehmerstellen in Fernmelde-, insbesondere Fernsprechanlagen |
GB1563802A (en) * | 1975-11-10 | 1980-04-02 | Post Office | Electronic current feed circuit |
JPS5267504A (en) * | 1975-12-02 | 1977-06-04 | Oki Electric Ind Co Ltd | Speaking current supply and supervision system |
CH599731A5 (fr) * | 1976-03-02 | 1978-05-31 | Ibm | |
DE2613590C2 (de) * | 1976-03-30 | 1977-10-27 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zur Auswertung von Zustandsänderung auf Leitungen in Fernmelde- insbesondere Fernsprechanlagen |
JPS52142905A (en) * | 1976-05-24 | 1977-11-29 | Hitachi Denshi Ltd | Control device of telephone call current supply |
US4087646A (en) * | 1977-01-28 | 1978-05-02 | Bell Telephone Laboratories, Incorporated | Dual mode telephone subscriber loop current detector |
US4142075A (en) * | 1977-10-11 | 1979-02-27 | Burr-Brown Research Corporation | Interface circuit and method for telephone extension lines |
US4228323A (en) * | 1979-01-31 | 1980-10-14 | Bell Telephone Laboratories, Incorporated | Variable loop length compensated barrier circuit |
-
1978
- 1978-06-02 IT IT68269/78A patent/IT1159706B/it active
-
1979
- 1979-05-21 BR BR7903166A patent/BR7903166A/pt unknown
- 1979-05-22 CA CA328,048A patent/CA1114084A/fr not_active Expired
- 1979-05-22 CH CH479779A patent/CH634703A5/it not_active IP Right Cessation
- 1979-05-22 GB GB7917736A patent/GB2022363B/en not_active Expired
- 1979-05-22 FR FR7912965A patent/FR2427751A1/fr not_active Withdrawn
- 1979-05-25 JP JP54064103A patent/JPS5853542B2/ja not_active Expired
- 1979-05-30 US US06/043,848 patent/US4287392A/en not_active Expired - Lifetime
- 1979-05-30 SE SE7904735A patent/SE7904735L/ unknown
- 1979-05-31 BE BE0/195508A patent/BE876692A/fr not_active IP Right Cessation
- 1979-05-31 DE DE2922271A patent/DE2922271C2/de not_active Expired
- 1979-05-31 NL NL7904313A patent/NL7904313A/xx not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3649769A (en) * | 1970-10-28 | 1972-03-14 | Gen Electric | Circuit for supplying direct current to a telephone line |
FR2216733A1 (fr) * | 1973-01-31 | 1974-08-30 | Labo Cent Telecommunicat | |
FR2254168A1 (en) * | 1973-12-11 | 1975-07-04 | Ass Ouvriers Instr Precision | Telephone line supply device - is an active electronic device acting as resistance for direct current and high impedance for A.C. |
US3955052A (en) * | 1974-11-18 | 1976-05-04 | Tadiran Israel Electronics Industries Ltd. | Subscriber unit particularly useful for time-division-multiplex system |
DE2608171A1 (de) * | 1975-02-28 | 1976-09-16 | Hitachi Ltd | Sprechweg-anordnung |
Non-Patent Citations (1)
Title |
---|
EXBK/76 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2502434A1 (fr) * | 1981-03-20 | 1982-09-24 | Trt Telecom Radio Electr | Circuit pour reduire la consommation dans un equipement de ligne d'abonne en cas de faux appel |
Also Published As
Publication number | Publication date |
---|---|
IT7868269A0 (it) | 1978-06-02 |
IT1159706B (it) | 1987-03-04 |
BR7903166A (pt) | 1980-01-15 |
DE2922271C2 (de) | 1983-02-24 |
NL7904313A (nl) | 1979-12-04 |
GB2022363A (en) | 1979-12-12 |
JPS5853542B2 (ja) | 1983-11-30 |
BE876692A (fr) | 1979-09-17 |
CH634703A5 (it) | 1983-02-15 |
CA1114084A (fr) | 1981-12-08 |
JPS54159114A (en) | 1979-12-15 |
SE7904735L (sv) | 1979-12-03 |
US4287392A (en) | 1981-09-01 |
GB2022363B (en) | 1982-06-16 |
DE2922271A1 (de) | 1979-12-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |