BE389548A - - Google Patents

Info

Publication number
BE389548A
BE389548A BE389548DA BE389548A BE 389548 A BE389548 A BE 389548A BE 389548D A BE389548D A BE 389548DA BE 389548 A BE389548 A BE 389548A
Authority
BE
Belgium
Prior art keywords
circuit
thermionic
gate
circuit according
relay
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE389548A publication Critical patent/BE389548A/fr

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q1/00Details of selecting apparatus or arrangements
    • H04Q1/18Electrical details
    • H04Q1/30Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/453Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Amplifiers (AREA)
BE389548D BE389548A (enrdf_load_html_response)

Publications (1)

Publication Number Publication Date
BE389548A true BE389548A (enrdf_load_html_response)

Family

ID=57644

Family Applications (1)

Application Number Title Priority Date Filing Date
BE389548D BE389548A (enrdf_load_html_response)

Country Status (1)

Country Link
BE (1) BE389548A (enrdf_load_html_response)

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