IT1024773B - DEVICE TO RESTRICT TELEPHONE CALLS TO LONG ROOMS - Google Patents

DEVICE TO RESTRICT TELEPHONE CALLS TO LONG ROOMS

Info

Publication number
IT1024773B
IT1024773B IT7027074A IT7027074A IT1024773B IT 1024773 B IT1024773 B IT 1024773B IT 7027074 A IT7027074 A IT 7027074A IT 7027074 A IT7027074 A IT 7027074A IT 1024773 B IT1024773 B IT 1024773B
Authority
IT
Italy
Prior art keywords
telephone calls
restrict
rooms
long
long rooms
Prior art date
Application number
IT7027074A
Other languages
Italian (it)
Original Assignee
Nagakura Masayuki
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
Priority claimed from JP873574A external-priority patent/JPS50104805A/ja
Priority claimed from JP873474A external-priority patent/JPS50104804A/ja
Priority claimed from JP1964574A external-priority patent/JPS50114905A/ja
Priority claimed from JP1964674A external-priority patent/JPS50114906A/ja
Priority claimed from JP5043474A external-priority patent/JPS50142107A/ja
Application filed by Nagakura Masayuki filed Critical Nagakura Masayuki
Application granted granted Critical
Publication of IT1024773B publication Critical patent/IT1024773B/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 Set Structure (AREA)
IT7027074A 1974-01-19 1974-11-07 DEVICE TO RESTRICT TELEPHONE CALLS TO LONG ROOMS IT1024773B (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP873574A JPS50104805A (en) 1974-01-19 1974-01-19
JP873474A JPS50104804A (en) 1974-01-19 1974-01-19
JP1964574A JPS50114905A (en) 1974-02-19 1974-02-19
JP1964674A JPS50114906A (en) 1974-02-19 1974-02-19
JP5043474A JPS50142107A (en) 1974-05-07 1974-05-07

Publications (1)

Publication Number Publication Date
IT1024773B true IT1024773B (en) 1978-07-20

Family

ID=27518978

Family Applications (1)

Application Number Title Priority Date Filing Date
IT7027074A IT1024773B (en) 1974-01-19 1974-11-07 DEVICE TO RESTRICT TELEPHONE CALLS TO LONG ROOMS

Country Status (5)

Country Link
AU (1) AU7316674A (en)
DE (1) DE2451069A1 (en)
FR (1) FR2258753A1 (en)
IT (1) IT1024773B (en)
SE (1) SE7411340L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BG37515A1 (en) * 1983-02-02 1985-06-14 Popov Device for limiting telephone dial selection
BG37516A1 (en) * 1983-03-14 1985-06-14 Popov Device for limiting telephone dial selection

Also Published As

Publication number Publication date
DE2451069A1 (en) 1975-07-24
FR2258753A1 (en) 1975-08-18
AU7316674A (en) 1976-03-18
SE7411340L (en) 1975-07-21

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