BE876692A - Circuit telephonique electronique pour ligne d'abonne - Google Patents

Circuit telephonique electronique pour ligne d'abonne

Info

Publication number: BE876692A
Authority: BE; Belgium
Prior art keywords: subscriber line; telephone circuit; electronic telephone; electronic; circuit
Prior art date: 1978-06-02

Application number

BE0/195508A

Other languages

English (en)

French (fr)

Original Assignee

Cselt Centro Studi Lab Telecom

Priority date (The priority date 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 date listed.)

1978-06-02

Filing date

1979-05-31

Publication date

1979-09-17

1979-05-31 Application filed by Cselt Centro Studi Lab Telecom filed Critical Cselt Centro Studi Lab Telecom

1979-09-17 Publication of BE876692A publication Critical patent/BE876692A/xx

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)

BE0/195508A 1978-06-02 1979-05-31 Circuit telephonique electronique pour ligne d'abonne BE876692A (fr)

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
BE876692A true BE876692A (fr)	1979-09-17

Family

ID=11308779

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE0/195508A BE876692A (fr)	1978-06-02	1979-05-31	Circuit telephonique electronique pour ligne d'abonne

Country Status (12)

Country	Link
US (1)	US4287392A (xx)
JP (1)	JPS5853542B2 (xx)
BE (1)	BE876692A (xx)
BR (1)	BR7903166A (xx)
CA (1)	CA1114084A (xx)
CH (1)	CH634703A5 (xx)
DE (1)	DE2922271C2 (xx)
FR (1)	FR2427751A1 (xx)
GB (1)	GB2022363B (xx)
IT (1)	IT1159706B (xx)
NL (1)	NL7904313A (xx)
SE (1)	SE7904735L (xx)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
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
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 (en) *	1994-04-29	1999-09-21	Harry W. Moore, Iii	Loop current detector

Family Cites Families (22)

* Cited by examiner, † Cited by third party
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
US3649769A (en) *	1970-10-28	1972-03-14	Gen Electric	Circuit for supplying direct current to a telephone line
CH586984A5 (xx) *	1974-12-23	1977-04-15	Ibm
JPS4950860A (xx) *	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
FR2216733B1 (xx) *	1973-01-31	1978-05-12	Labo Cent Telecommunicat
FR2254167B2 (xx) *	1973-12-10	1978-08-18	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.
US3914556A (en) *	1974-06-12	1975-10-21	Itt	On-hook and off-hook detector for telephone switching systems
US3955052A (en) *	1974-11-18	1976-05-04	Tadiran Israel Electronics Industries Ltd.	Subscriber unit particularly useful for time-division-multiplex system
JPS5199408A (xx) *	1975-02-28	1976-09-02	Hitachi Ltd
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 (xx) *	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 FR FR7912965A patent/FR2427751A1/fr not_active Withdrawn
- 1979-05-22 CA CA328,048A patent/CA1114084A/en not_active Expired
- 1979-05-22 GB GB7917736A patent/GB2022363B/en not_active Expired
- 1979-05-22 CH CH479779A patent/CH634703A5/it not_active IP Right Cessation
- 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 NL NL7904313A patent/NL7904313A/xx not_active Application Discontinuation
- 1979-05-31 DE DE2922271A patent/DE2922271C2/de not_active Expired
- 1979-05-31 BE BE0/195508A patent/BE876692A/xx not_active IP Right Cessation

Also Published As

Publication number	Publication date
DE2922271A1 (de)	1979-12-06
BR7903166A (pt)	1980-01-15
IT1159706B (it)	1987-03-04
DE2922271C2 (de)	1983-02-24
US4287392A (en)	1981-09-01
IT7868269A0 (it)	1978-06-02
GB2022363A (en)	1979-12-12
FR2427751A1 (fr)	1979-12-28
SE7904735L (sv)	1979-12-03
JPS5853542B2 (ja)	1983-11-30
GB2022363B (en)	1982-06-16
NL7904313A (nl)	1979-12-04
CH634703A5 (it)	1983-02-15
CA1114084A (en)	1981-12-08
JPS54159114A (en)	1979-12-15

Similar Documents

Publication	Publication Date	Title
FR2382815B1 (fr)	1986-12-12	Joncteur de circuit telephonique ou de ligne d'abonne
FR2542548B1 (fr)	1986-11-28	Circuit d'interface de ligne telephonique
FR2406358B1 (fr)	1986-06-20	Circuit d'interface pour poste telephonique
FR2416600B1 (fr)	1986-06-13	Circuit de ligne telephonique
FR2456438B1 (fr)	1987-07-31	Circuit de ligne d'abonne au telephone
BE862521A (fr)	1978-04-14	Circuit interface pour ligne telephonique
GB2007463B (en)	1982-01-20	Telephone subscriber's line circuit
FR2315811A1 (fr)	1977-01-21	Dipole electronique pour le bouclage d'une ligne telephonique
BE876692A (fr)	1979-09-17	Circuit telephonique electronique pour ligne d'abonne
GB2015305B (en)	1982-04-21	Telephone line circuit
BE861868A (fr)	1978-03-31	Equipement de ligne d'abonne pour central telephonique
FR2456439B1 (fr)	1987-07-31	Circuit pour ligne d'abonne
JPS57212853A (en)	1982-12-27	Subscriber's telephone electronic voice circuit
FR2527404B1 (fr)	1987-10-23	Joncteur d'abonne electronique
FR2460078B1 (fr)	1986-12-12	Joncteur d'abonne electronique
FR2530105B1 (fr)	1985-07-05	Circuit de boucle pour ligne telephonique
FR2456432B1 (fr)	1986-05-09	Circuit de raccordement pour une ligne telephonique
GB2018093B (en)	1982-06-23	Telephone subscriber's line circuit
BE867538A (fr)	1978-11-27	Circuit pour alimenter une jonction d'abonne
BE861080A (fr)	1978-03-16	Equipement de ligne d'abonne pour central telephonique
FR2498851B1 (fr)	1986-06-13	Circuit d'interface de ligne d'abonne
BE880144R (fr)	1980-05-20	Pont d'alimentation electronique pour ligne telephonique
BE879983A (fr)	1980-05-13	Pont d'alimentation electronique pour ligne telephonique
FR2352450A1 (fr)	1977-12-16	Circuit de terminaison pour une ligne telephonique
FR2551604B1 (fr)	1985-10-25	Dispositif de teletaxation pour terminal telephonique electronique

Legal Events

Date	Code	Title	Description
1984-11-30	RE	Patent lapsed	Owner name: CSELT - CENTRO STUDI E LABORATORI TELECOMUNICAZIO Effective date: 19840531

Date

Code

Title

Description

1984-11-30

Patent lapsed

Owner name: CSELT - CENTRO STUDI E LABORATORI TELECOMUNICAZIO

Effective date: 19840531