BE426045A - - Google Patents

Info

Publication number
BE426045A
BE426045A BE426045DA BE426045A BE 426045 A BE426045 A BE 426045A BE 426045D A BE426045D A BE 426045DA BE 426045 A BE426045 A BE 426045A
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 BE426045A publication Critical patent/BE426045A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
    • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
BE426045D 1937-01-30 BE426045A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2203755X 1937-01-30

Publications (1)

Publication Number Publication Date
BE426045A true BE426045A (en)

Family

ID=7989901

Family Applications (1)

Application Number Title Priority Date Filing Date
BE426045D BE426045A (en) 1937-01-30

Country Status (2)

Country Link
US (1) US2203755A (en)
BE (1) BE426045A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579469A (en) * 1939-03-24 1951-12-25 Int Standard Electric Corp Revertive calling party line system
DE760807C (en) * 1941-02-08 1954-05-24 Siemens & Halske A G Circuit arrangement for inductive selection in telecommunication systems, in particular telephone systems
GB598552A (en) * 1945-01-30 1948-02-20 Bertram Morton Hadfield Improvements in or relating to electrical signalling systems

Also Published As

Publication number Publication date
US2203755A (en) 1940-06-11

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