ZA796372B - An interference suppression circuit for use with a two-wire transmission line - Google Patents

An interference suppression circuit for use with a two-wire transmission line

Info

Publication number
ZA796372B
ZA796372B ZA00796372A ZA796372A ZA796372B ZA 796372 B ZA796372 B ZA 796372B ZA 00796372 A ZA00796372 A ZA 00796372A ZA 796372 A ZA796372 A ZA 796372A ZA 796372 B ZA796372 B ZA 796372B
Authority
ZA
South Africa
Prior art keywords
transmission line
interference suppression
suppression circuit
wire transmission
wire
Prior art date
Application number
ZA00796372A
Other languages
English (en)
Inventor
R Lechner
A Dalhof
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of ZA796372B publication Critical patent/ZA796372B/xx

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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Noise Elimination (AREA)
ZA00796372A 1978-11-24 1979-11-23 An interference suppression circuit for use with a two-wire transmission line ZA796372B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2850929A DE2850929C2 (de) 1978-11-24 1978-11-24 Schaltungsanordnung zur Unterdrückung von Störspannungseinflüssen bei der Bewertung des Signalzustandes auf Übertragungsleitungen, insbesondere auf Teilnehmeranschlußleitungen in Fernsprechanlagen

Publications (1)

Publication Number Publication Date
ZA796372B true ZA796372B (en) 1980-11-26

Family

ID=6055489

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00796372A ZA796372B (en) 1978-11-24 1979-11-23 An interference suppression circuit for use with a two-wire transmission line

Country Status (5)

Country Link
US (1) US4297531A (xx)
EP (1) EP0011720A1 (xx)
JP (1) JPS5574288A (xx)
DE (1) DE2850929C2 (xx)
ZA (1) ZA796372B (xx)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2938981A1 (de) * 1979-09-26 1981-04-30 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zur registrierung des schaltzustandes in einem insbesondere durch teilnehmeranschlussleitungen von fernsprechvermittlungsanlagen gebildeten schaltkreis
DE2939009A1 (de) * 1979-09-26 1981-04-09 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zur feststellung des schaltzustandes einer teilnehmeranschlussleitung in fernsprechvermittlungsanlagen
JPS5852780Y2 (ja) * 1980-07-19 1983-12-01 パイオニア株式会社 マイクロホン
DE3036686C2 (de) * 1980-09-29 1983-12-01 Siemens AG, 1000 Berlin und 8000 München Teilnehmeranschlußschaltung
FR2501940B1 (fr) * 1981-03-11 1985-07-19 Trt Telecom Radio Electr Detecteur de boucle peu sensible aux tensions longitudinales
DE3133934A1 (de) * 1981-08-27 1983-03-17 Siemens AG, 1000 Berlin und 8000 München Teilnehmeranschlussschaltung
ATE79710T1 (de) * 1986-04-23 1992-09-15 Siemens Ag Schaltungsanordnung fuer den anschluss von anschlussleitungen eines digitalen zeitmultiplex- fernsprechnetzes.
JP2639304B2 (ja) * 1993-06-15 1997-08-13 日本電気株式会社 加入者回路
JP5182859B2 (ja) * 2007-01-29 2013-04-17 株式会社ステップテクニカ 評価装置及び評価システム

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB959316A (en) * 1961-03-14 1964-05-27 Standard Telephones Cables Ltd Improvements in or relating to signal transmission apparatus
GB1201093A (en) * 1967-09-06 1970-08-05 Gen Electric & English Elect Improvements in or relating to telephone line loop-detecting circuits
US3611145A (en) * 1968-08-05 1971-10-05 Lummus Co Method and apparatus for the suppression of noise in process control systems
DE1937359B2 (de) * 1969-07-23 1970-05-21 Licentia Gmbh Schaltungsanordnung fuer die Pruefung des Belegungszustandes von Teilnehmerstellen in Fernmelde-,insbesondere Fernsprechanlagen
BE754235A (fr) * 1969-08-05 1970-12-31 Western Electric Co Circuit de supervision pour lignes telephoniques
DE1962721A1 (de) * 1969-12-15 1971-06-16 Telefonbau & Normalzeit Gmbh Schaltungsanordnung zur Erkennung des Zustandes symmetrischer und unsymmetrischer Teilnehmerschleifen in Fernmelde-,insbesondere Fernsprechanlagen
FR2158619A5 (xx) * 1971-10-26 1973-06-15 Constr Telephoniques
US3808377A (en) * 1972-09-15 1974-04-30 Gte Automatic Electric Lab Inc Remote sensing circuit
DE2555432C2 (de) * 1975-12-10 1982-07-29 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Schaltungsanordnung zur Kompensation der Einwirkung einer Starkstromleitung auf ein Fernmeldekabel
CH604453A5 (xx) * 1976-06-25 1978-09-15 Ibm
DE2703650A1 (de) * 1977-01-27 1978-08-03 Siemens Ag Schaltungsanordnung zur Beseitigung von Stoerungen auf Gleichspannungen
US4087646A (en) * 1977-01-28 1978-05-02 Bell Telephone Laboratories, Incorporated Dual mode telephone subscriber loop current detector
US4103112A (en) * 1977-10-17 1978-07-25 Northern Telecom Limited Telephone line circuit with differential loop current sensing and compensation

Also Published As

Publication number Publication date
DE2850929A1 (de) 1980-05-29
JPS5574288A (en) 1980-06-04
EP0011720A1 (de) 1980-06-11
US4297531A (en) 1981-10-27
DE2850929C2 (de) 1982-06-09

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