BE347955A - - Google Patents

Info

Publication number
BE347955A
BE347955A BE347955DA BE347955A BE 347955 A BE347955 A BE 347955A BE 347955D A BE347955D A BE 347955DA BE 347955 A BE347955 A BE 347955A
Authority
BE
Belgium
Prior art keywords
contact
relay
subscriber
circuit
operator
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE347955A publication Critical patent/BE347955A/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
    • H04M3/62Keyboard equipment

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
BE347955D BE347955A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Publications (1)

Publication Number Publication Date
BE347955A true BE347955A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Family

ID=23529

Family Applications (1)

Application Number Title Priority Date Filing Date
BE347955D BE347955A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Country Status (1)

Country Link
BE (1) BE347955A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

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