CS256919B1 - Device for dialling's limitation with telephone set - Google Patents

Device for dialling's limitation with telephone set Download PDF

Info

Publication number
CS256919B1
CS256919B1 CS86484A CS86484A CS256919B1 CS 256919 B1 CS256919 B1 CS 256919B1 CS 86484 A CS86484 A CS 86484A CS 86484 A CS86484 A CS 86484A CS 256919 B1 CS256919 B1 CS 256919B1
Authority
CS
Czechoslovakia
Prior art keywords
contact
relay
distance
foam
annapata
Prior art date
Application number
CS86484A
Other languages
Czech (cs)
English (en)
Inventor
Naumov K Popov
Original Assignee
Naumov K Popov
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Naumov K Popov filed Critical Naumov K Popov
Publication of CS256919B1 publication Critical patent/CS256919B1/cs

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)
  • Telephone Function (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
CS86484A 1983-02-02 1984-02-07 Device for dialling's limitation with telephone set CS256919B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BG5955583A BG37515A1 (en) 1983-02-02 1983-02-02 Device for limiting telephone dial selection

Publications (1)

Publication Number Publication Date
CS256919B1 true CS256919B1 (en) 1988-04-15

Family

ID=3911702

Family Applications (1)

Application Number Title Priority Date Filing Date
CS86484A CS256919B1 (en) 1983-02-02 1984-02-07 Device for dialling's limitation with telephone set

Country Status (7)

Country Link
BG (1) BG37515A1 (ro)
CS (1) CS256919B1 (ro)
DD (1) DD252109A3 (ro)
DE (1) DE3403304A1 (ro)
HU (1) HU189034B (ro)
PL (1) PL142207B1 (ro)
RO (1) RO88643A (ro)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1268215B (de) * 1965-11-26 1968-05-16 Christos Stathacopoulos Vorrichtung an einem Fernsprechapparat zum Sperren des Apparates fuer Selbstwaehlferngespraeche
DE2341246A1 (de) * 1973-08-16 1975-02-20 Hagenuk Neufeldt Kuhnke Gmbh Elektronische sperreinrichtung fuer nummernschalterwahl zur verhinderung der wahl unerwuenschter waehlziffern
SE7411340L (ro) * 1974-01-19 1975-07-21 Masayuki Nagakura
DE3227763A1 (de) * 1982-07-24 1984-02-02 Krone Gmbh, 1000 Berlin Einrichtung zur wahlweisen freigabe oder sperrung einer fernwahl-rufnummer

Also Published As

Publication number Publication date
HU189034B (en) 1986-06-30
BG37515A1 (en) 1985-06-14
PL246020A1 (en) 1984-11-08
DD252109A3 (de) 1987-12-09
DE3403304A1 (de) 1984-08-16
HUT36310A (en) 1985-08-28
PL142207B1 (en) 1987-09-30
RO88643A (ro) 1986-02-28

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