FR2258753A1 - Telephone STD monitoring device - prevents prohibited dialling of trunk calls while allowing local calls from office, shop etc. - Google Patents

Telephone STD monitoring device - prevents prohibited dialling of trunk calls while allowing local calls from office, shop etc.

Info

Publication number
FR2258753A1
FR2258753A1 FR7435749A FR7435749A FR2258753A1 FR 2258753 A1 FR2258753 A1 FR 2258753A1 FR 7435749 A FR7435749 A FR 7435749A FR 7435749 A FR7435749 A FR 7435749A FR 2258753 A1 FR2258753 A1 FR 2258753A1
Authority
FR
France
Prior art keywords
calls
control element
telephone
dialling
std
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
FR7435749A
Other languages
English (en)
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NAGAKURA MASAYUKI JA
Original Assignee
NAGAKURA MASAYUKI JA
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 JA filed Critical NAGAKURA MASAYUKI JA
Publication of FR2258753A1 publication Critical patent/FR2258753A1/fr
Withdrawn legal-status Critical Current

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)
FR7435749A 1974-01-19 1974-10-24 Telephone STD monitoring device - prevents prohibited dialling of trunk calls while allowing local calls from office, shop etc. Withdrawn FR2258753A1 (en)

Applications Claiming Priority (5)

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

Publications (1)

Publication Number Publication Date
FR2258753A1 true FR2258753A1 (en) 1975-08-18

Family

ID=27518978

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7435749A Withdrawn FR2258753A1 (en) 1974-01-19 1974-10-24 Telephone STD monitoring device - prevents prohibited dialling of trunk calls while allowing local calls from office, shop etc.

Country Status (5)

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

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
AU7316674A (en) 1976-03-18
SE7411340L (enrdf_load_html_response) 1975-07-21
IT1024773B (it) 1978-07-20
DE2451069A1 (de) 1975-07-24

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Legal Events

Date Code Title Description
ST Notification of lapse