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BR8006799A - Adaptacao de chamada seletiva - Google Patents

Adaptacao de chamada seletiva

Info

Publication number
BR8006799A
BR8006799A BR8006799A BR8006799A BR8006799A BR 8006799 A BR8006799 A BR 8006799A BR 8006799 A BR8006799 A BR 8006799A BR 8006799 A BR8006799 A BR 8006799A BR 8006799 A BR8006799 A BR 8006799A
Authority
BR
Brazil
Prior art keywords
selective call
call adaptation
adaptation
selective
call
Prior art date
Application number
BR8006799A
Other languages
English (en)
Inventor
P Sothcott
Original Assignee
Int Standard Electric Corp
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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of BR8006799A publication Critical patent/BR8006799A/pt

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
    • H04M1/663—Preventing unauthorised calls to a telephone set
    • H04M1/665—Preventing unauthorised calls to a telephone set by checking the validity of a code

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
BR8006799A 1979-10-25 1980-10-22 Adaptacao de chamada seletiva BR8006799A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7937037A GB2062410A (en) 1979-10-25 1979-10-25 Call barring arrangement

Publications (1)

Publication Number Publication Date
BR8006799A true BR8006799A (pt) 1981-04-28

Family

ID=10508759

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8006799A BR8006799A (pt) 1979-10-25 1980-10-22 Adaptacao de chamada seletiva

Country Status (2)

Country Link
BR (1) BR8006799A (pt)
GB (1) GB2062410A (pt)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1243791A (en) * 1985-03-08 1988-10-25 Computrex Centres Ltd. Telecommunications security device
GB8621333D0 (en) * 1986-09-04 1986-10-15 Manitoba Telephone System Key management system
GB2203614A (en) * 1987-04-09 1988-10-19 British Broadcasting Corp Control of access to a telephone
FR2625860B1 (fr) * 1988-01-11 1992-05-07 Ceicom Procede et dispositif en vue de limiter les appels vers un telephone
KR900702695A (ko) * 1988-07-25 1990-12-08 제임스 앤더슨 존 암호식 전화기
GB2240903B (en) * 1990-02-13 1994-07-13 Proton Communications Automatic telephone call interceptor and interrogator devices

Also Published As

Publication number Publication date
GB2062410A (en) 1981-05-20

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