ES445388A1 - Un circuito electrico para detectar cambios de estado en unalinea de telecomunicacion entre su estado en bucle abierto yen bucle cerrado. - Google Patents

Un circuito electrico para detectar cambios de estado en unalinea de telecomunicacion entre su estado en bucle abierto yen bucle cerrado.

Info

Publication number
ES445388A1
ES445388A1 ES445388A ES445388A ES445388A1 ES 445388 A1 ES445388 A1 ES 445388A1 ES 445388 A ES445388 A ES 445388A ES 445388 A ES445388 A ES 445388A ES 445388 A1 ES445388 A1 ES 445388A1
Authority
ES
Spain
Prior art keywords
loop
controlled
hall effect
line
excitation windings
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
ES445388A
Other languages
English (en)
Spanish (es)
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES445388A1 publication Critical patent/ES445388A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Control Of Eletrric Generators (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Fire-Detection Mechanisms (AREA)
ES445388A 1975-02-20 1976-02-20 Un circuito electrico para detectar cambios de estado en unalinea de telecomunicacion entre su estado en bucle abierto yen bucle cerrado. Expired ES445388A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB715875A GB1478219A (en) 1975-02-20 1975-02-20 Telecommunication exchange circuits

Publications (1)

Publication Number Publication Date
ES445388A1 true ES445388A1 (es) 1977-06-16

Family

ID=9827726

Family Applications (1)

Application Number Title Priority Date Filing Date
ES445388A Expired ES445388A1 (es) 1975-02-20 1976-02-20 Un circuito electrico para detectar cambios de estado en unalinea de telecomunicacion entre su estado en bucle abierto yen bucle cerrado.

Country Status (7)

Country Link
BE (1) BE838697A (en:Method)
BR (1) BR7507715A (en:Method)
ES (1) ES445388A1 (en:Method)
FR (1) FR2301982A1 (en:Method)
GB (1) GB1478219A (en:Method)
IT (1) IT1055300B (en:Method)
NO (1) NO144404C (en:Method)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2013000A (en) * 1978-01-20 1979-08-01 Hitachi Ltd Dc D.C. magnetic field cancellation circuit
GB2146872B (en) * 1983-09-15 1986-11-05 Stc Plc Hall effect module for loop detector
US5333192A (en) * 1990-06-26 1994-07-26 Northern Telecom Limited Line interface circuit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1158584B (de) * 1962-08-16 1963-12-05 Telefunken Patent Schaltungsanordnung zur Pruefung des Anruf- und Belegungszustandes der Teilnehmerleitungen in Fernmelde-, insbesondere Fernsprechvermittlungsanlagen mit Hilfe von Hall-Generatoren
US3848094A (en) * 1972-12-29 1974-11-12 Stromberg Carlson Corp Telephone battery feed circuit

Also Published As

Publication number Publication date
IT1055300B (it) 1981-12-21
BR7507715A (pt) 1976-08-24
NO144404C (no) 1981-08-19
BE838697A (fr) 1976-08-19
FR2301982A1 (fr) 1976-09-17
NO144404B (no) 1981-05-11
NO760488L (en:Method) 1976-09-01
GB1478219A (en) 1977-06-29

Similar Documents

Publication Publication Date Title
SE7708760L (sv) Koppling for att efterbilda en elektrisk storhet
ES445388A1 (es) Un circuito electrico para detectar cambios de estado en unalinea de telecomunicacion entre su estado en bucle abierto yen bucle cerrado.
ES272543A1 (es) Dispositivo de memoria
ES432378A1 (es) Circuito de seguridad para un aparato electrico.
JPS5222715A (en) Protection device for motor and control semiconductor element
GB890308A (en) Improvements in and relating to electrical phase angle comparators
JPS5625400A (en) Exciter for synchronous machine
SU629586A1 (ru) Устройство дл защиты от пробо изол ции на корпус во второй точке ротора синхронной машины
SU564681A1 (ru) Устройство дл контрол работы и автоматического переключател электроагрегатов посто нного тока
JPS5748662A (en) Large current measuring device
JPS5313912A (en) Magnetic tape copying device
SU96004A1 (ru) Устройство дл измерени запаса надежности
ES309750A1 (es) Un dispositivo de memoria magnetica
SU463200A2 (ru) Устройство дл улучшени коммутации электрических машин посто нного тока
ES449631A3 (es) Perfeccionamientos introducidos en un dispositivo de controlpara la bobina de retencion de un disyuntor.
ES418867A1 (es) Regulador de velocidad para motores, en particular para mo-tores de corriente unidireccional empleables en maquinas la-vadoras-centrifugadoras.
FR2336786A1 (fr) Disjoncteur electrique
JPS5649694A (en) Simulator for instantaneous power failure
GB1215774A (en) Improvements in or relating to electrical safety circuits
JPS5556701A (en) Variable attenuator
ES377016A1 (es) Perfeccionamientos en instalaciones reguladoras giratorias.
ES398234A1 (es) Mejoras en circuitos telefonicos de linea individual.
ES258953A1 (es) Un aparato alternador de iman permanente
ES326349A1 (es) Una maquina dinamo-electrica.
ES320026A3 (es) Perfeccionamientos en la construcciën de relevadores electricos