PL142207B1 - Apparatus for limitation of possibility of dialling of telephone set - Google Patents

Apparatus for limitation of possibility of dialling of telephone set Download PDF

Info

Publication number
PL142207B1
PL142207B1 PL24602084A PL24602084A PL142207B1 PL 142207 B1 PL142207 B1 PL 142207B1 PL 24602084 A PL24602084 A PL 24602084A PL 24602084 A PL24602084 A PL 24602084A PL 142207 B1 PL142207 B1 PL 142207B1
Authority
PL
Poland
Prior art keywords
contact
relay
dialing
telephone set
magnetically controlled
Prior art date
Application number
PL24602084A
Other languages
English (en)
Polish (pl)
Other versions
PL246020A1 (en
Inventor
Kiril N Popov
Original Assignee
Sofijska Telegrafna I Telefonn
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 Sofijska Telegrafna I Telefonn filed Critical Sofijska Telegrafna I Telefonn
Publication of PL246020A1 publication Critical patent/PL246020A1/xx
Publication of PL142207B1 publication Critical patent/PL142207B1/pl

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)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
PL24602084A 1983-02-02 1984-02-02 Apparatus for limitation of possibility of dialling of telephone set PL142207B1 (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 (2)

Publication Number Publication Date
PL246020A1 PL246020A1 (en) 1984-11-08
PL142207B1 true PL142207B1 (en) 1987-09-30

Family

ID=3911702

Family Applications (1)

Application Number Title Priority Date Filing Date
PL24602084A PL142207B1 (en) 1983-02-02 1984-02-02 Apparatus for limitation of possibility of dialling of telephone set

Country Status (7)

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

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 (cs) * 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
HUT36310A (en) 1985-08-28
CS256919B1 (en) 1988-04-15
DE3403304A1 (de) 1984-08-16
HU189034B (en) 1986-06-30
RO88643A (ro) 1986-02-28
DD252109A3 (de) 1987-12-09
PL246020A1 (en) 1984-11-08
BG37515A1 (en) 1985-06-14

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