BE492940A - - Google Patents

Info

Publication number
BE492940A
BE492940A BE492940DA BE492940A BE 492940 A BE492940 A BE 492940A BE 492940D A BE492940D A BE 492940DA BE 492940 A BE492940 A BE 492940A
Authority
BE
Belgium
Prior art keywords
signal
tube
pulses
discriminating
digit
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE492940A publication Critical patent/BE492940A/fr

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/26Devices for calling a subscriber
    • H04M1/515Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of DC signals of alternating polarity, coded pulses or impedance dialling

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
BE492940D BE492940A (enrdf_load_stackoverflow)

Publications (1)

Publication Number Publication Date
BE492940A true BE492940A (enrdf_load_stackoverflow)

Family

ID=137058

Family Applications (1)

Application Number Title Priority Date Filing Date
BE492940D BE492940A (enrdf_load_stackoverflow)

Country Status (1)

Country Link
BE (1) BE492940A (enrdf_load_stackoverflow)

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