DE2142841A1 - - Google Patents

Info

Publication number
DE2142841A1
DE2142841A1 DE19712142841 DE2142841A DE2142841A1 DE 2142841 A1 DE2142841 A1 DE 2142841A1 DE 19712142841 DE19712142841 DE 19712142841 DE 2142841 A DE2142841 A DE 2142841A DE 2142841 A1 DE2142841 A1 DE 2142841A1
Authority
DE
Germany
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.)
Granted
Application number
DE19712142841
Other languages
German (de)
Other versions
DE2142841C (de
DE2142841B2 (de
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 filed Critical
Priority to DE19712142841 priority Critical patent/DE2142841C/de
Priority claimed from DE19712142841 external-priority patent/DE2142841C/de
Priority to IT2846372A priority patent/IT964225B/it
Publication of DE2142841A1 publication Critical patent/DE2142841A1/de
Publication of DE2142841B2 publication Critical patent/DE2142841B2/de
Application granted granted Critical
Publication of DE2142841C publication Critical patent/DE2142841C/de
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
DE19712142841 1971-08-26 1971-08-26 Schaltungsanordnung zur Erzeugung eines akustischen Rufsignals fur Endstel len in Fernmelde , insbesondere Fernsprech anlagen mittels eines Piezowandlers Expired DE2142841C (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19712142841 DE2142841C (de) 1971-08-26 Schaltungsanordnung zur Erzeugung eines akustischen Rufsignals fur Endstel len in Fernmelde , insbesondere Fernsprech anlagen mittels eines Piezowandlers
IT2846372A IT964225B (it) 1971-08-26 1972-08-24 Disposizione circuitale per gene rare un segnale acustico di chia mata per apparecchi terminali in impianti di telecomunicazioni spe cie in impianti telefonici median te un trasduttore piezoelettrico

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712142841 DE2142841C (de) 1971-08-26 Schaltungsanordnung zur Erzeugung eines akustischen Rufsignals fur Endstel len in Fernmelde , insbesondere Fernsprech anlagen mittels eines Piezowandlers

Publications (3)

Publication Number Publication Date
DE2142841A1 true DE2142841A1 (enrdf_load_html_response) 1972-11-16
DE2142841B2 DE2142841B2 (de) 1972-11-16
DE2142841C DE2142841C (de) 1973-05-30

Family

ID=

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4636585A (en) * 1983-07-08 1987-01-13 Geobra Brandstatter Gmbh & Co. Kg Telephone installations

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4636585A (en) * 1983-07-08 1987-01-13 Geobra Brandstatter Gmbh & Co. Kg Telephone installations

Also Published As

Publication number Publication date
DE2142841B2 (de) 1972-11-16
IT964225B (it) 1974-01-21

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Legal Events

Date Code Title Description
EHJ Ceased/non-payment of the annual fee