AU571556B2 - Telephone security device - Google Patents
Telephone security deviceInfo
- 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
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)
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)
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)
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 |
-
1984
- 1984-08-07 AU AU31676/84A patent/AU571556B2/en not_active Ceased
Patent Citations (3)
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)
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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