JPS526003A - Device for protecting subscriber*s telephone set - Google Patents

Device for protecting subscriber*s telephone set

Info

Publication number
JPS526003A
JPS526003A JP51075020A JP7502076A JPS526003A JP S526003 A JPS526003 A JP S526003A JP 51075020 A JP51075020 A JP 51075020A JP 7502076 A JP7502076 A JP 7502076A JP S526003 A JPS526003 A JP S526003A
Authority
JP
Japan
Prior art keywords
telephone set
protecting subscriber
subscriber
protecting
telephone
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.)
Pending
Application number
JP51075020A
Other languages
English (en)
Inventor
Yohanesu Gerarudasu Ya Danieru
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of JPS526003A publication Critical patent/JPS526003A/ja
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Protection Of Static Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
JP51075020A 1975-06-30 1976-06-26 Device for protecting subscriber*s telephone set Pending JPS526003A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NLAANVRAGE7507731,A NL174420C (nl) 1975-06-30 1975-06-30 Beveiligingsinrichting voor een telefoontoestel.

Publications (1)

Publication Number Publication Date
JPS526003A true JPS526003A (en) 1977-01-18

Family

ID=19824045

Family Applications (1)

Application Number Title Priority Date Filing Date
JP51075020A Pending JPS526003A (en) 1975-06-30 1976-06-26 Device for protecting subscriber*s telephone set

Country Status (9)

Country Link
US (1) US4079211A (ja)
JP (1) JPS526003A (ja)
BE (1) BE843514A (ja)
DE (1) DE2627199C2 (ja)
FR (1) FR2316812A1 (ja)
GB (1) GB1514662A (ja)
IT (1) IT1062379B (ja)
NL (1) NL174420C (ja)
SE (1) SE403234B (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60107995A (ja) * 1983-11-16 1985-06-13 Oki Electric Ind Co Ltd 通話路直流ル−プ回路
JPH0496191U (ja) * 1984-07-06 1992-08-20

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE410695B (sv) * 1976-12-22 1979-10-22 Gullfiber Ab Horselskydd med hortelefoner
GB2064268B (en) * 1979-09-17 1983-10-26 Philips Nv Electronic signalling device for connection to a signal transmission line
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.
FR2556909B1 (fr) * 1983-12-14 1986-04-18 Radiotechnique Compelec Dispositif d'interface pour un poste telephonique
DE3541974A1 (de) * 1985-11-28 1987-06-04 Danfoss As Schutzschaltung fuer die induktionsspule eines magnetisch-induktiven durchflussmessers
AU601737B2 (en) * 1986-04-30 1990-09-20 Alcatel Australia Limited Telephone protection circuit
JPH01502953A (ja) * 1986-04-30 1989-10-05 スタンダード・テレフオンズ・アンド・ケーブルズ・ピー・テイ・ワイ・リミテッド 電話保護回路
US4941063A (en) * 1988-03-04 1990-07-10 Oneac Corporation Telephone lines overvoltage protection apparatus
US4944015A (en) * 1988-04-29 1990-07-24 Juve Ronald A Audio compression circuit for television audio signals
US4870530A (en) * 1988-06-27 1989-09-26 Advanced Micro Devices, Inc. Electrostatic discharge protection circuitry for any two external pins of an I.C. package
US5208718A (en) * 1988-12-12 1993-05-04 Alcatel N.V. Protection circuit
AU634187B2 (en) * 1988-12-12 1993-02-18 Alcatel Australia Limited A protection circuit
US4849846A (en) * 1988-12-16 1989-07-18 Northern Telecom Limited Telephone protection circuit
US5212617A (en) * 1989-12-29 1993-05-18 Robert Bosch Gmbh Circuit for compensating very fast current fluctuations
US5369711A (en) * 1990-08-31 1994-11-29 Bellsouth Corporation Automatic gain control for a headset
US5371803A (en) * 1990-08-31 1994-12-06 Bellsouth Corporation Tone reduction circuit for headsets
GB9021222D0 (en) * 1990-09-28 1990-11-14 Raychem Ltd Circuit protection device
US5493469A (en) * 1991-01-18 1996-02-20 Mildred A. Lace Surge protection for data lines
CA2095500C (en) * 1992-06-08 1997-09-23 Dimitris Jim Pelegris Telephone line overvoltage protection method and apparatus
JP3283964B2 (ja) * 1992-06-09 2002-05-20 ロックウェル・インターナショナル・コーポレイション モデムサージ保護回路およびサージ保護方法
US5369666A (en) * 1992-06-09 1994-11-29 Rockwell International Corporation Modem with digital isolation
JPH06334775A (ja) * 1993-05-19 1994-12-02 Canon Inc 網制御装置
US5315651A (en) * 1993-06-09 1994-05-24 Rockwell International Corporation Active surge rejection circuit
US5701352A (en) * 1994-07-14 1997-12-23 Bellsouth Corporation Tone suppression automatic gain control for a headset
US5905623A (en) * 1997-05-27 1999-05-18 Oneac Corporation Telephone and data overvoltage protection apparatus including a longitudinal transformer
AU2001270178A1 (en) * 2000-06-26 2002-01-08 Premier Aviation, Inc. Method and apparatus for detecting electrical faults and isolating power source from the electrical faults
US6671144B1 (en) 2000-06-26 2003-12-30 Premier Aviation, Inc. Method and apparatus for detecting ground faults and for isolating power supply from the ground faults
US20090296300A1 (en) * 2008-05-30 2009-12-03 Casey Kelly C SCR circuit for protecting customer end of telephone line
US8451576B2 (en) * 2008-05-30 2013-05-28 Littelfuse, Inc. SCR circuit for protecting central office end of telephone line

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1288100A (fr) * 1961-02-06 1962-03-24 Thomson Houston Comp Francaise Perfectionnements aux stabilisateurs de tension
US3359434A (en) * 1965-04-06 1967-12-19 Control Data Corp Silicon controlled rectifier arrangement for improved shortcircuit protection
US3558830A (en) * 1969-04-09 1971-01-26 Communication Technology Inc Overvoltage transmission line protector
DE2058891B1 (de) * 1970-11-30 1972-05-25 Siemens Ag Schaltungsanordnung zum Schutz gegen UEberlastung fuer die Transistoren einer Leistungsendstufe
CA930488A (en) * 1971-08-27 1973-07-17 C. J. Cowpland Michael Power supply
JPS531123B2 (ja) * 1973-12-28 1978-01-14
CA1032221A (en) * 1974-06-14 1978-05-30 Mitel Canada Limited Telephone line impedance regulator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60107995A (ja) * 1983-11-16 1985-06-13 Oki Electric Ind Co Ltd 通話路直流ル−プ回路
JPH0496191U (ja) * 1984-07-06 1992-08-20

Also Published As

Publication number Publication date
SE403234B (sv) 1978-07-31
FR2316812A1 (fr) 1977-01-28
FR2316812B1 (ja) 1982-08-13
GB1514662A (en) 1978-06-21
NL174420C (nl) 1984-06-01
SE7607333L (sv) 1976-12-31
NL174420B (nl) 1984-01-02
NL7507731A (nl) 1977-01-03
DE2627199A1 (de) 1977-02-03
US4079211A (en) 1978-03-14
BE843514A (fr) 1976-12-28
DE2627199C2 (de) 1983-01-20
IT1062379B (it) 1984-10-10

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