ES467492A1 - Un circuito para alimentar una linea telefonica que incluye un dispositivo de proteccion. - Google Patents

Un circuito para alimentar una linea telefonica que incluye un dispositivo de proteccion.

Info

Publication number
ES467492A1
ES467492A1 ES467492A ES467492A ES467492A1 ES 467492 A1 ES467492 A1 ES 467492A1 ES 467492 A ES467492 A ES 467492A ES 467492 A ES467492 A ES 467492A ES 467492 A1 ES467492 A1 ES 467492A1
Authority
ES
Spain
Prior art keywords
protective device
telephone line
circuit including
feeding circuit
line feeding
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
ES467492A
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.)
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 ES467492A1 publication Critical patent/ES467492A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/18—Automatic or semi-automatic exchanges with means for reducing interference or noise; with means for reducing effects due to line faults with means for protecting lines
    • 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)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephone Function (AREA)
ES467492A 1977-03-02 1978-03-02 Un circuito para alimentar una linea telefonica que incluye un dispositivo de proteccion. Expired ES467492A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7706101A FR2382810A1 (fr) 1977-03-02 1977-03-02 Circuit d'alimentation de ligne telephonique avec protection

Publications (1)

Publication Number Publication Date
ES467492A1 true ES467492A1 (es) 1978-10-16

Family

ID=9187455

Family Applications (1)

Application Number Title Priority Date Filing Date
ES467492A Expired ES467492A1 (es) 1977-03-02 1978-03-02 Un circuito para alimentar una linea telefonica que incluye un dispositivo de proteccion.

Country Status (8)

Country Link
US (1) US4167654A (es)
AR (1) AR213892A1 (es)
BE (1) BE864426R (es)
BR (1) BR7801240A (es)
CH (1) CH627894A5 (es)
ES (1) ES467492A1 (es)
FR (1) FR2382810A1 (es)
MX (1) MX143920A (es)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7807706A (nl) * 1978-07-19 1980-01-22 Philips Nv Voedingsbrug met d.c.-compensatie voor beide richtin- gen van de voedingstroom.
US4264787A (en) * 1979-12-31 1981-04-28 Akzona Incorporated Hazardous voltage protection circuit
NL8001136A (nl) * 1980-02-26 1981-09-16 Philips Nv Schakeling voor toepassing in een telefoontoestel.
US4306119A (en) * 1980-07-03 1981-12-15 Bell Telephone Laboratories, Incorporated Telephone outpulsing circuit
NL8103419A (nl) * 1981-04-01 1982-11-01 Philips Nv Lijntestcircuit voor een abonneetelefoontoestel.
DE3237681C2 (de) * 1982-10-12 1986-03-27 Standard Elektrik Lorenz Ag, 7000 Stuttgart Speiseschaltung für einen veränderlichen Verbraucherwiderstand und mit unterschiedlich wirkendem Ausgangswiderstand
NL8204377A (nl) * 1982-11-12 1984-06-01 Philips Nv Abonneecircuit voor een telefoonnet.
US4618743A (en) * 1984-11-27 1986-10-21 Harris Corporation Monolithic transient protector
US4634814A (en) * 1985-02-04 1987-01-06 Gte Communication Systems Corp. Surge protected electronic switch for telephone voiceband circuits
AR241360A1 (es) * 1986-06-30 1992-05-29 Siemens Ag Disposicion de circuito para desconectar los hilos de una linea de conexion de abonado de una red telefonica digital tiempo-multiplex con respecto a un circuito de alimentacion.
DE3712572C1 (de) * 1987-04-14 1988-08-04 Telefonbau & Normalzeit Gmbh Schaltungsanordnung fuer den UEberspannungsschutz und die Rufstromeinspeisung an einer Anschlussleitung fuer Fernmelde-,insbesondere Fernsprechvermittlungsanlagen
CA1333189C (en) * 1987-06-17 1994-11-22 Toshiro Tojo Protection circuit for battery feed circuit
US5359655A (en) * 1991-06-06 1994-10-25 U.S. Philips Corporation Supply circuit for a telecommunication line, providing highly symmetrical and rapid response to line voltage disturbances
WO1998010582A1 (en) * 1996-09-03 1998-03-12 Philips Electronics N.V. Electronic impedance supply circuit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE788539A (fr) * 1971-09-10 1973-03-08 Westinghouse Electric Corp Systeme electrique a barriere d'energie
US3787739A (en) * 1972-12-29 1974-01-22 Microsystems Int Ltd Coupler circuit for telephone networks and the like
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.
CA1032221A (en) * 1974-06-14 1978-05-30 Mitel Canada Limited Telephone line impedance regulator

Also Published As

Publication number Publication date
CH627894A5 (de) 1982-01-29
FR2382810A1 (fr) 1978-09-29
BE864426R (fr) 1978-09-01
BR7801240A (pt) 1978-10-31
FR2382810B1 (es) 1983-01-07
MX143920A (es) 1981-07-31
AR213892A1 (es) 1979-03-30
US4167654A (en) 1979-09-11

Similar Documents

Publication Publication Date Title
ES467492A1 (es) Un circuito para alimentar una linea telefonica que incluye un dispositivo de proteccion.
GB2042306B (en) Current limited subscriber line feed circuit
JPS5377407A (en) Telephone line overvoltage protector
AU540480B2 (en) Constant current telephone line circuit
JPS5541095A (en) Line feeding type loudspeaker telephone circuit device
JPS5386507A (en) Telephone subscriber constant current supplying circuit
JPS538755A (en) Protective device for electrical circuits
JPS55144729A (en) Overvoltage protector for electronic device
IL53295A (en) Voltage surge protector device
GB1527962A (en) Electrical protection apparatus
GB1552640A (en) Electrical circuit for an overcurrent protecting device
IT1077647B (it) Interruttore di protezione per linee elettriche,munito di un dispositivo ausiliario di avvio dello scorrimento dell'arco elettrico
ES473416A1 (es) Circuito de control para maquina de soldadura electrica.
ZA807308B (en) Telephone line feed circuit
AU514559B2 (en) Electrical protection circuit arrangement
GB1512073A (en) Protective systems for switches
JPS5213646A (en) Overvoltage protection circuit for electronic device in vehicle
JPS53138209A (en) Protective system of trunk circuit
AU500222B2 (en) Feeding arrangement fora telephone line circuit
JPS51115669A (en) Abnormal current protecting switch
JPS52147725A (en) Overvoltage protector for electric device
GB2007453B (en) Regulator with short circuit protection
JPS52137671A (en) Device for preventing circuit parts from breaking
FR2378255A1 (fr) Circuit de mise a feu d'etoupilles, protege contre les surintensites
GB1539635A (en) Telephone subscriber's line circuit including over-voltage protection means