BE522577A - - Google Patents

Info

Publication number
BE522577A
BE522577A BE522577DA BE522577A BE 522577 A BE522577 A BE 522577A BE 522577D A BE522577D A BE 522577DA BE 522577 A BE522577 A BE 522577A
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 BE522577A publication Critical patent/BE522577A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
BE522577D 1952-09-05 BE522577A (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR934954X 1952-09-05

Publications (1)

Publication Number Publication Date
BE522577A true BE522577A (xx)

Family

ID=9456478

Family Applications (1)

Application Number Title Priority Date Filing Date
BE522577D BE522577A (xx) 1952-09-05

Country Status (4)

Country Link
US (1) US2846513A (xx)
BE (1) BE522577A (xx)
DE (1) DE934954C (xx)
FR (1) FR1062736A (xx)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1074662B (de) * 1957-10-10 1960-02-04 Pye Limited, Cambridge (Grossbritannien) Automatisches Telefonsystem mit elektronischer Schaltung des Rufstromes zu einem Teilnehmer
US3350508A (en) * 1964-12-10 1967-10-31 Bell Telephone Labor Inc Immediate ringing circuit for telephone systems
US3470533A (en) * 1965-10-18 1969-09-30 Northern Electric Co Matrix switching of sources and control
US3752924A (en) * 1971-11-10 1973-08-14 Bell Telephone Labor Inc Telephone subscriber line ring-trip detection circuit
US3904831A (en) * 1974-01-09 1975-09-09 Stromberg Carlson Corp Tone control arrangement for electronic PABX

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2535675A (en) * 1948-10-29 1950-12-26 Bell Telephone Labor Inc Ringing control circuit
US2714632A (en) * 1949-12-20 1955-08-02 Bell Telephone Labor Inc Ringing generator and interrupter using electron tubes

Also Published As

Publication number Publication date
FR1062736A (fr) 1954-04-27
DE934954C (de) 1955-11-10
US2846513A (en) 1958-08-05

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