BE631477A - - Google Patents

Info

Publication number
BE631477A
BE631477A BE631477DA BE631477A BE 631477 A BE631477 A BE 631477A BE 631477D A BE631477D A BE 631477DA BE 631477 A BE631477 A BE 631477A
Authority
BE
Belgium
Application number
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.)
Publication of BE631477A publication Critical patent/BE631477A/xx

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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
BE631477D 1962-04-24 BE631477A (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES79142A DE1161957B (de) 1962-04-24 1962-04-24 Schaltungsanordnung zum Anrufen von Teilnehmern in Fernsprechanlagen

Publications (1)

Publication Number Publication Date
BE631477A true BE631477A (zh)

Family

ID=7507975

Family Applications (1)

Application Number Title Priority Date Filing Date
BE631477D BE631477A (zh) 1962-04-24

Country Status (2)

Country Link
BE (1) BE631477A (zh)
DE (1) DE1161957B (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4028628A (en) * 1975-12-05 1977-06-07 Bell Telephone Laboratories, Incorporated Transceivers for single channel carrier telephone systems

Also Published As

Publication number Publication date
DE1161957B (de) 1964-01-30

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