BE435700A - - Google Patents

Info

Publication number
BE435700A
BE435700A BE435700DA BE435700A BE 435700 A BE435700 A BE 435700A BE 435700D A BE435700D A BE 435700DA BE 435700 A BE435700 A BE 435700A
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 BE435700A publication Critical patent/BE435700A/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
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
BE435700D 1938-07-30 BE435700A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL95305A DE761755C (de) 1938-07-30 1938-07-30 Schaltungsanordnung fuer Fernmeldeanlagen, in denen Signale durch Wechselstroeme einer bestimmten Frequenz gegeben werden

Publications (1)

Publication Number Publication Date
BE435700A true BE435700A (enrdf_load_stackoverflow)

Family

ID=27797494

Family Applications (1)

Application Number Title Priority Date Filing Date
BE435700D BE435700A (enrdf_load_stackoverflow) 1938-07-30

Country Status (6)

Country Link
US (1) US2238263A (enrdf_load_stackoverflow)
BE (1) BE435700A (enrdf_load_stackoverflow)
CH (1) CH213513A (enrdf_load_stackoverflow)
DE (1) DE761755C (enrdf_load_stackoverflow)
FR (1) FR858471A (enrdf_load_stackoverflow)
NL (2) NL55006C (enrdf_load_stackoverflow)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE428639C (de) * 1926-05-20 Siemens & Halske Akt Ges Elektrische Anrufeinrichtung fuer Fernmeldeleitungen
DE377922C (de) * 1921-02-22 1923-06-29 Western Electric Co Ltd Schaltungsanordnung zur Signaluebermittlung

Also Published As

Publication number Publication date
NL56981C (enrdf_load_stackoverflow)
NL55006C (enrdf_load_stackoverflow)
DE761755C (de) 1953-11-02
FR858471A (fr) 1940-11-26
CH213513A (de) 1941-02-15
US2238263A (en) 1941-04-15

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