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AU571556B2 - Telephone security device - Google Patents
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AU571556B2 - Telephone security device - Google Patents

Telephone security device

Info

Publication number
AU571556B2
AU571556B2 AU31676/84A AU3167684A AU571556B2 AU 571556 B2 AU571556 B2 AU 571556B2 AU 31676/84 A AU31676/84 A AU 31676/84A AU 3167684 A AU3167684 A AU 3167684A AU 571556 B2 AU571556 B2 AU 571556B2
Authority
AU
Australia
Prior art keywords
security device
telephone security
telephone
security
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.)
Ceased
Application number
AU31676/84A
Other versions
AU3167684A (en
Inventor
Peter Samuel Vogel
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.)
VOGEL PS
Original Assignee
Vogel P S
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 Vogel P S filed Critical Vogel P S
Priority to AU31676/84A priority Critical patent/AU571556B2/en
Publication of AU3167684A publication Critical patent/AU3167684A/en
Application granted granted Critical
Publication of AU571556B2 publication Critical patent/AU571556B2/en
Anticipated expiration legal-status Critical
Ceased 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
    • H04M1/667—Preventing unauthorised calls from a telephone set
    • H04M1/67—Preventing unauthorised calls from a telephone set by electronic means
    • H04M1/673—Preventing unauthorised calls from a telephone set by electronic means the user being required to key in a code

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
AU31676/84A 1977-08-01 1984-08-07 Telephone security device Ceased AU571556B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU31676/84A AU571556B2 (en) 1977-08-01 1984-08-07 Telephone security device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU104977 1977-08-01
AU31676/84A AU571556B2 (en) 1977-08-01 1984-08-07 Telephone security device

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
AU38532/78A Addition AU525240B2 (en) 1977-08-01 1977-08-01 Telephone security system

Publications (2)

Publication Number Publication Date
AU3167684A AU3167684A (en) 1986-02-13
AU571556B2 true AU571556B2 (en) 1988-04-21

Family

ID=25608965

Family Applications (1)

Application Number Title Priority Date Filing Date
AU31676/84A Ceased AU571556B2 (en) 1977-08-01 1984-08-07 Telephone security device

Country Status (1)

Country Link
AU (1) AU571556B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU599222B2 (en) * 1987-04-13 1990-07-12 Fujitsu Limited Apparatus for controlling calls in a mobile communication system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985972A (en) * 1974-08-08 1976-10-12 Rolin Robert J Telephone call restrictor
US4188508A (en) * 1978-08-21 1980-02-12 Brindle Patrick A Telephone call restricting apparatus
AU3215284A (en) * 1983-07-21 1985-03-04 Malca Pty. Ltd. Telephone trunk barring device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985972A (en) * 1974-08-08 1976-10-12 Rolin Robert J Telephone call restrictor
US4188508A (en) * 1978-08-21 1980-02-12 Brindle Patrick A Telephone call restricting apparatus
AU3215284A (en) * 1983-07-21 1985-03-04 Malca Pty. Ltd. Telephone trunk barring device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU599222B2 (en) * 1987-04-13 1990-07-12 Fujitsu Limited Apparatus for controlling calls in a mobile communication system

Also Published As

Publication number Publication date
AU3167684A (en) 1986-02-13

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