BE637296A - - Google Patents

Info

Publication number
BE637296A
BE637296A BE637296DA BE637296A BE 637296 A BE637296 A BE 637296A BE 637296D A BE637296D A BE 637296DA BE 637296 A BE637296 A BE 637296A
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 BE637296A publication Critical patent/BE637296A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
BE637296D 1962-09-17 BE637296A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US223897A US3218395A (en) 1962-09-17 1962-09-17 Electronic signaling arrangement

Publications (1)

Publication Number Publication Date
BE637296A true BE637296A (de)

Family

ID=22838420

Family Applications (1)

Application Number Title Priority Date Filing Date
BE637296D BE637296A (de) 1962-09-17

Country Status (2)

Country Link
US (1) US3218395A (de)
BE (1) BE637296A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0052835A1 (de) * 1980-11-20 1982-06-02 Licentia Patent-Verwaltungs-GmbH Schaltungsanordnung zur Ableitung einer Steuergrösse zum Freigeben und Sperren der Tonaussendung bei einer Tonrufschaltung für Fernmeldeanlagen

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3300585A (en) * 1963-09-04 1967-01-24 Northern Electric Co Self-polarized electrostatic microphone-semiconductor amplifier combination
NL7017136A (de) * 1970-11-24 1972-05-26
US3740490A (en) * 1971-01-18 1973-06-19 Bell Telephone Labor Inc Tone ringer
US3965307A (en) * 1974-05-28 1976-06-22 Gte Automatic Electric Laboratories Incorporated Electronic tone ringer
US4359610A (en) * 1978-12-29 1982-11-16 Chang Pan W Telephone ringing circuit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3036159A (en) * 1954-06-24 1962-05-22 Ralph D Collins Telephone identification system
US2957950A (en) * 1954-11-18 1960-10-25 Bell Telephone Labor Inc Transistor selective ringing circuit
US3005053A (en) * 1957-09-09 1961-10-17 Bell Telephone Labor Inc Telephone signaling system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0052835A1 (de) * 1980-11-20 1982-06-02 Licentia Patent-Verwaltungs-GmbH Schaltungsanordnung zur Ableitung einer Steuergrösse zum Freigeben und Sperren der Tonaussendung bei einer Tonrufschaltung für Fernmeldeanlagen

Also Published As

Publication number Publication date
US3218395A (en) 1965-11-16

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