BE340840A - - Google Patents

Info

Publication number
BE340840A
BE340840A BE340840DA BE340840A BE 340840 A BE340840 A BE 340840A BE 340840D A BE340840D A BE 340840DA BE 340840 A BE340840 A BE 340840A
Authority
BE
Belgium
Prior art keywords
relay
armature
circuit
switch
earth
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE340840A publication Critical patent/BE340840A/fr

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M3/00Automatic or semi-automatic exchanges
    • H04M3/60Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
    • H04M3/64Arrangements for signalling the number or class of the calling line to the operator

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
BE340840D BE340840A (ja)

Publications (1)

Publication Number Publication Date
BE340840A true BE340840A (ja)

Family

ID=17554

Family Applications (1)

Application Number Title Priority Date Filing Date
BE340840D BE340840A (ja)

Country Status (1)

Country Link
BE (1) BE340840A (ja)

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