DE68920558D1 - Fernsprechschutzschaltung. - Google Patents

Fernsprechschutzschaltung.

Info

Publication number
DE68920558D1
DE68920558D1 DE68920558T DE68920558T DE68920558D1 DE 68920558 D1 DE68920558 D1 DE 68920558D1 DE 68920558 T DE68920558 T DE 68920558T DE 68920558 T DE68920558 T DE 68920558T DE 68920558 D1 DE68920558 D1 DE 68920558D1
Authority
DE
Germany
Prior art keywords
voltage
diodes
triac
pair
line
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 - Fee Related
Application number
DE68920558T
Other languages
English (en)
Other versions
DE68920558T2 (de
Inventor
Francis Yun-Tai Hung
Donald Scott Mcginn
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Application granted granted Critical
Publication of DE68920558D1 publication Critical patent/DE68920558D1/de
Publication of DE68920558T2 publication Critical patent/DE68920558T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Protection Of Static Devices (AREA)
DE68920558T 1988-12-08 1989-05-05 Fernsprechschutzschaltung. Expired - Fee Related DE68920558T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000585390A CA1307315C (en) 1988-12-08 1988-12-08 Telephone protection circuit

Publications (2)

Publication Number Publication Date
DE68920558D1 true DE68920558D1 (de) 1995-02-23
DE68920558T2 DE68920558T2 (de) 1995-05-04

Family

ID=4139255

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68920558T Expired - Fee Related DE68920558T2 (de) 1988-12-08 1989-05-05 Fernsprechschutzschaltung.

Country Status (7)

Country Link
EP (1) EP0372673B1 (de)
JP (1) JP2765943B2 (de)
KR (1) KR0132057B1 (de)
CN (1) CN1043417A (de)
AT (1) ATE117151T1 (de)
CA (1) CA1307315C (de)
DE (1) DE68920558T2 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3905772C2 (de) * 1989-02-24 1996-10-17 Dbt Gmbh Elektrisches Energieübertragungssystem für die eigensichere Energieübertragung
DE4402461A1 (de) * 1994-01-28 1995-08-03 Sel Alcatel Ag Schutzschaltung für eine Teilnehmeranschlußschaltung sowie Teilnehmeranschlußschaltung damit
DE10040795C2 (de) * 2000-08-21 2003-01-02 Siemens Ag Überspannungsschutz für eine elektrische Schaltung mit potentialfreier Spannungsversorgung
DE102005029867B3 (de) * 2005-06-27 2007-02-22 Siemens Ag Schutzschaltung in einer Einrichtung zur Einkopplung von Fernspeisespannungen
CN101106596B (zh) * 2007-07-20 2011-05-04 华为技术有限公司 电子装置及其用户线路套片
CN115275958B (zh) * 2022-09-28 2023-03-17 深圳市高斯宝电气技术有限公司 一种通信电源下电电路的防雷电路

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2213243B2 (de) * 1972-03-18 1978-03-09 Brown, Boveri & Cie Ag, 6800 Mannheim Schaltungsanordnung zur Spannungsbegrenzung
US3878434A (en) * 1973-12-10 1975-04-15 Leeds & Northrup Co Power-limiting electrical barrier device
NO870996L (no) * 1986-04-04 1987-10-05 Siemens Ag Koblingsanordning til aa verne en forbruker mot overspenninger.
CA1281768C (en) * 1986-09-09 1991-03-19 Francis Yun-Tai Hung Protection arrangements for communications lines

Also Published As

Publication number Publication date
DE68920558T2 (de) 1995-05-04
EP0372673A2 (de) 1990-06-13
KR900011096A (ko) 1990-07-11
JPH02159928A (ja) 1990-06-20
CA1307315C (en) 1992-09-08
ATE117151T1 (de) 1995-01-15
CN1043417A (zh) 1990-06-27
EP0372673A3 (de) 1991-07-17
JP2765943B2 (ja) 1998-06-18
EP0372673B1 (de) 1995-01-11
KR0132057B1 (en) 1998-04-20

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee