ES484231A1 - Dispositivo de inyeccion de timbre en un equipo de linea de aparato telefonico - Google Patents

Dispositivo de inyeccion de timbre en un equipo de linea de aparato telefonico

Info

Publication number
ES484231A1
ES484231A1 ES484231A ES484231A ES484231A1 ES 484231 A1 ES484231 A1 ES 484231A1 ES 484231 A ES484231 A ES 484231A ES 484231 A ES484231 A ES 484231A ES 484231 A1 ES484231 A1 ES 484231A1
Authority
ES
Spain
Prior art keywords
line equipment
injection device
ring injection
transistor
diode
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.)
Expired
Application number
ES484231A
Other languages
English (en)
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Publication of ES484231A1 publication Critical patent/ES484231A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

Dispositivo de inyección de timbre en un equipo de línea de aparato telefónico, caracterizado por el hecho de que está constituido por un circuito, en el que, sobre cada hilo de alimentación, se encuentran insertados, en serie con una resistencia, un conjunto constituido por un diodo y el circuito colector-emisor de un transistor, montados en paralelo, estando unido el cátodo de un diodo al colector del transistor en el lado de uno de los hilos de alimentación, estando unidos el ánodo del otro diodo y el emisor del otro transistor al otro hilo.
ES484231A 1978-09-19 1979-09-18 Dispositivo de inyeccion de timbre en un equipo de linea de aparato telefonico Expired ES484231A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7826823A FR2437121A1 (fr) 1978-09-19 1978-09-19 Nouveau dispositif d'injection de sonnerie dans les postes telephoniques

Publications (1)

Publication Number Publication Date
ES484231A1 true ES484231A1 (es) 1980-04-16

Family

ID=9212774

Family Applications (1)

Application Number Title Priority Date Filing Date
ES484231A Expired ES484231A1 (es) 1978-09-19 1979-09-18 Dispositivo de inyeccion de timbre en un equipo de linea de aparato telefonico

Country Status (3)

Country Link
US (1) US4306118A (es)
ES (1) ES484231A1 (es)
FR (1) FR2437121A1 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0051446A1 (en) * 1980-10-28 1982-05-12 British Telecommunications Improvements in or relating to line interface circuits
US4524246A (en) * 1982-07-07 1985-06-18 Harris Corporation SLIC II--common-mode current rejection
FR2549668B1 (fr) * 1983-07-22 1985-10-04 Thomson Csf Mat Tel Circuit injecteur de sonnerie pour poste telephonique d'abonne
US4598173A (en) * 1984-10-15 1986-07-01 Itt Corporation Interface circuit for a subscriber line circuit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3829619A (en) * 1972-12-29 1974-08-13 Stromberg Carlson Corp Telephone ring trip circuit
US3917909A (en) * 1974-03-07 1975-11-04 Gte Automatic Electric Lab Inc Ring injection method for transformer coupled telephone
CH600714A5 (es) * 1974-09-24 1978-06-30 Siemens Ag Albis
FR2366756A1 (fr) * 1976-09-30 1978-04-28 Labo Cent Telecommunicat Circuit electronique d'injection de sonnerie
FR2368845A1 (fr) * 1976-10-19 1978-05-19 Ericsson Telefon Ab L M Dispositif d'appel telephonique

Also Published As

Publication number Publication date
FR2437121A1 (fr) 1980-04-18
FR2437121B1 (es) 1982-01-15
US4306118A (en) 1981-12-15

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19970203