FR455006A - Telephone system with automatic blocking of all prohibited communications - Google Patents

Telephone system with automatic blocking of all prohibited communications

Info

Publication number
FR455006A
FR455006A FR455006A FR455006DA FR455006A FR 455006 A FR455006 A FR 455006A FR 455006 A FR455006 A FR 455006A FR 455006D A FR455006D A FR 455006DA FR 455006 A FR455006 A FR 455006A
Authority
FR
France
Prior art keywords
telephone system
automatic blocking
prohibited communications
prohibited
communications
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.)
Expired
Application number
FR455006A
Other languages
French (fr)
Inventor
Georg Heimann
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR455006A publication Critical patent/FR455006A/en
Expired 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
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
    • 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)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Structure Of Telephone Exchanges (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Prepayment Telephone Systems (AREA)
FR455006A 1912-03-18 1913-03-04 Telephone system with automatic blocking of all prohibited communications Expired FR455006A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE269302T 1912-03-18

Publications (1)

Publication Number Publication Date
FR455006A true FR455006A (en) 1913-07-21

Family

ID=32571881

Family Applications (1)

Application Number Title Priority Date Filing Date
FR455006A Expired FR455006A (en) 1912-03-18 1913-03-04 Telephone system with automatic blocking of all prohibited communications

Country Status (4)

Country Link
US (1) US1341801A (en)
DE (1) DE269302C (en)
FR (1) FR455006A (en)
GB (2) GB191211261A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE967314C (en) * 1954-03-20 1957-10-31 Hagenuk Neufeldt Kuhnke Gmbh Device for locking multi-digit restricted numbers on self-dialers of coin operated telephones

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624085A (en) * 1949-05-10 1953-01-06 Feiner Richard Staple for attaching buttons
DE943123C (en) * 1953-01-28 1956-05-09 Lorenz C Ag Number switch with blocking of individual phone numbers
DE970417C (en) * 1954-03-20 1958-09-18 Hagenuk Neufeldt Kuhnke Gmbh Device for locking multi-digit restricted numbers on number switches of telephone sets
US3566042A (en) * 1967-05-04 1971-02-23 Giorgio Pugliese Device for preventing or signalling the dialing of given telephone numbers
US3553382A (en) * 1967-08-04 1971-01-05 Edward R Edelberg Toll call signalling and diverting system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE967314C (en) * 1954-03-20 1957-10-31 Hagenuk Neufeldt Kuhnke Gmbh Device for locking multi-digit restricted numbers on self-dialers of coin operated telephones

Also Published As

Publication number Publication date
GB191211261A (en) 1913-05-08
GB191311590A (en) 1914-05-19
DE269302C (en)
US1341801A (en) 1920-06-01

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