HUT36310A - Device for limiting selection of number to telephone sets - Google Patents

Device for limiting selection of number to telephone sets

Info

Publication number
HUT36310A
HUT36310A HU42084A HU42084A HUT36310A HU T36310 A HUT36310 A HU T36310A HU 42084 A HU42084 A HU 42084A HU 42084 A HU42084 A HU 42084A HU T36310 A HUT36310 A HU T36310A
Authority
HU
Hungary
Prior art keywords
telephone sets
limiting selection
selection
limiting
telephone
Prior art date
Application number
HU42084A
Other languages
Hungarian (hu)
Other versions
HU189034B (en
Inventor
Popov K Naumov
Original Assignee
Sofiiska 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 Sofiiska Telegrafna I Telefonn filed Critical Sofiiska Telegrafna I Telefonn
Publication of HUT36310A publication Critical patent/HUT36310A/en
Publication of HU189034B publication Critical patent/HU189034B/en

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)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
HU42084A 1983-02-02 1984-01-31 Device for limiting selection of number to telephone sets HU189034B (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
HUT36310A true HUT36310A (en) 1985-08-28
HU189034B HU189034B (en) 1986-06-30

Family

ID=3911702

Family Applications (1)

Application Number Title Priority Date Filing Date
HU42084A HU189034B (en) 1983-02-02 1984-01-31 Device for limiting selection of number to telephone sets

Country Status (7)

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

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1268215B (en) * 1965-11-26 1968-05-16 Christos Stathacopoulos Device on a telephone set for locking the set for self-dialing calls
DE2341246A1 (en) * 1973-08-16 1975-02-20 Hagenuk Neufeldt Kuhnke Gmbh Electronic dialling monitor - prevents dialling of unauthorised numbers especially certain first and second figures
SE7411340L (en) * 1974-01-19 1975-07-21 Masayuki Nagakura
DE3227763A1 (en) * 1982-07-24 1984-02-02 Krone Gmbh, 1000 Berlin Device for optional release or barring of a trunk dialling telephone number

Also Published As

Publication number Publication date
PL246020A1 (en) 1984-11-08
BG37515A1 (en) 1985-06-14
PL142207B1 (en) 1987-09-30
RO88643A (en) 1986-02-28
CS256919B1 (en) 1988-04-15
HU189034B (en) 1986-06-30
DD252109A3 (en) 1987-12-09
DE3403304A1 (en) 1984-08-16

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Legal Events

Date Code Title Description
HU90 Patent valid on 900628
HMM4 Cancellation of final prot. due to non-payment of fee