FR2326090A1 - Circuit d'appel telephonique - Google Patents

Circuit d'appel telephonique

Info

Publication number
FR2326090A1
FR2326090A1 FR7529684A FR7529684A FR2326090A1 FR 2326090 A1 FR2326090 A1 FR 2326090A1 FR 7529684 A FR7529684 A FR 7529684A FR 7529684 A FR7529684 A FR 7529684A FR 2326090 A1 FR2326090 A1 FR 2326090A1
Authority
FR
France
Prior art keywords
call
automatic stopping
telephone
photo
signals
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.)
Granted
Application number
FR7529684A
Other languages
English (en)
French (fr)
Other versions
FR2326090B1 (enExample
Inventor
Luong Le
Bernard Gilles
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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.)
Filing date
Publication date
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to FR7529684A priority Critical patent/FR2326090A1/fr
Publication of FR2326090A1 publication Critical patent/FR2326090A1/fr
Application granted granted Critical
Publication of FR2326090B1 publication Critical patent/FR2326090B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/005—Interface circuits for subscriber lines

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
FR7529684A 1975-09-26 1975-09-26 Circuit d'appel telephonique Granted FR2326090A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7529684A FR2326090A1 (fr) 1975-09-26 1975-09-26 Circuit d'appel telephonique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7529684A FR2326090A1 (fr) 1975-09-26 1975-09-26 Circuit d'appel telephonique

Publications (2)

Publication Number Publication Date
FR2326090A1 true FR2326090A1 (fr) 1977-04-22
FR2326090B1 FR2326090B1 (enExample) 1979-03-30

Family

ID=9160543

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7529684A Granted FR2326090A1 (fr) 1975-09-26 1975-09-26 Circuit d'appel telephonique

Country Status (1)

Country Link
FR (1) FR2326090A1 (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2465379A1 (fr) * 1979-09-07 1981-03-20 Iskra Sozd Elektro Indus Appareillage d'abonne pour standard telephonique automatique et electronique d'abonne

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1119925B (de) * 1957-12-14 1961-12-21 Standard Elektrik Lorenz Ag Schaltungsanordnung fuer eine Teilnehmeranschlussschaltung in elektronischen Vermittlngseinrichtungen fuer Fernmelde-, insbesondere Fernsprechanlagen
DE2230040A1 (de) * 1972-06-20 1974-01-10 Siemens Ag Schaltungsanordnung zur rufstromsteuerung in fernsprechvermittlungsanlagen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1119925B (de) * 1957-12-14 1961-12-21 Standard Elektrik Lorenz Ag Schaltungsanordnung fuer eine Teilnehmeranschlussschaltung in elektronischen Vermittlngseinrichtungen fuer Fernmelde-, insbesondere Fernsprechanlagen
DE2230040A1 (de) * 1972-06-20 1974-01-10 Siemens Ag Schaltungsanordnung zur rufstromsteuerung in fernsprechvermittlungsanlagen

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
AUTEUR: LEBRUN ET AUTRES) *
PAGES 1323 ET 1324. ARTICLE "LOOP AND RING CURRENT DETECTOR FOR A TELEPHONE LINE" *
PUBLICATION US "I.B.M. TECHNICAL DISCLOSURE BULLETIN", VOLUME 16 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2465379A1 (fr) * 1979-09-07 1981-03-20 Iskra Sozd Elektro Indus Appareillage d'abonne pour standard telephonique automatique et electronique d'abonne

Also Published As

Publication number Publication date
FR2326090B1 (enExample) 1979-03-30

Similar Documents

Publication Publication Date Title
GB729206A (en) Electronic character selecting and/or printing apparatus
FR2326090A1 (fr) Circuit d'appel telephonique
ES464741A1 (es) Equipo de linea de abonado para central telefonica.
GB1384927A (en) Amplitude-adjustment circuits for transmitters
ES268516A1 (es) Mejoras en aparatos telefënicos
GB1039668A (en) Improvements relating to telephone system substation circuits
ES450552A1 (es) Perfeccionamientos en aparatos de conversion de energia electrica.
FR2368845A1 (fr) Dispositif d'appel telephonique
US2345046A (en) Intercommunicating system
US4536614A (en) Supervision and dial pulse detection circuit for a telephone subscriber line
FR2395655A1 (fr) Circuit d'appel et de boucle
FR2355423A1 (fr) Equipement de ligne d'abonne pour central telephonique
KR890016819A (ko) 키폰 시스템에 있어서 도어폰 인터페이스 회로
JPS54139304A (en) Dial signal transmission system
FR2386209A1 (fr) Detecteur de boucle devant detecter la fermeture d'une boucle d'abonne au cours du reveil a l'aide d'inversions rapides de la polarite d'une source d'alimentation
JPS5743575A (en) Control device of current type inverter
JPS5575364A (en) Ringing tone control unit
JPS57135557A (en) Ringing tone control circuit
GB1045543A (en) A signal generator operable in dependence upon a magnetic field
JPS5534559A (en) Inter-office information transmission device
FR2313818A1 (fr) Dispositif d'amorcage d'un thyristor
JPS648755A (en) Conference communication equipment
JPS5329540A (en) Power line carrier communication device
JPS523318A (en) Howler circuit
JPS56149158A (en) Key telephone set

Legal Events

Date Code Title Description
ST Notification of lapse