BE381073A - - Google Patents

Info

Publication number
BE381073A
BE381073A BE381073DA BE381073A BE 381073 A BE381073 A BE 381073A BE 381073D A BE381073D A BE 381073DA BE 381073 A BE381073 A BE 381073A
Authority
BE
Belgium
Prior art keywords
relay
line
contact
connection
current
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE381073A publication Critical patent/BE381073A/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/677—Preventing the dialling or sending of predetermined telephone numbers or selected types of telephone numbers, e.g. long distance numbers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
BE381073D BE381073A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Publications (1)

Publication Number Publication Date
BE381073A true BE381073A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Family

ID=50691

Family Applications (1)

Application Number Title Priority Date Filing Date
BE381073D BE381073A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Country Status (1)

Country Link
BE (1) BE381073A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

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