ES2026119A6 - Portable system for the protection of spoken information transmitted via the telephone channel using frequency inversion techniques - Google Patents

Portable system for the protection of spoken information transmitted via the telephone channel using frequency inversion techniques

Info

Publication number
ES2026119A6
ES2026119A6 ES9100840A ES9100840A ES2026119A6 ES 2026119 A6 ES2026119 A6 ES 2026119A6 ES 9100840 A ES9100840 A ES 9100840A ES 9100840 A ES9100840 A ES 9100840A ES 2026119 A6 ES2026119 A6 ES 2026119A6
Authority
ES
Spain
Prior art keywords
spoken information
transmitted via
information transmitted
protection
portable system
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 - Lifetime
Application number
ES9100840A
Other languages
Spanish (es)
Inventor
Mazon Francisco Peran
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.)
ENA TELECOMUNICACIONES SA
Original Assignee
ENA TELECOMUNICACIONES SA
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 ENA TELECOMUNICACIONES SA filed Critical ENA TELECOMUNICACIONES SA
Priority to ES9100840A priority Critical patent/ES2026119A6/en
Publication of ES2026119A6 publication Critical patent/ES2026119A6/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Mobile Radio Communication Systems (AREA)

Abstract

Portable system for the protection of spoken information transmitted via the telephone channel using frequency inversion techniques which consists of a compact assembly of electronic devices which carry out conversions on the electrical signal which conveys the spoken information and which are inserted between the connector of the telephone terminal and the rosette for connection to the telephone line, preventing the spoken information transmitted via said line from being listened to, similar equipment being installed at the other end of the line and carrying out the reverse conversions, obtaining the original signal.
ES9100840A 1991-03-26 1991-03-26 Portable system for the protection of spoken information transmitted via the telephone channel using frequency inversion techniques Expired - Lifetime ES2026119A6 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES9100840A ES2026119A6 (en) 1991-03-26 1991-03-26 Portable system for the protection of spoken information transmitted via the telephone channel using frequency inversion techniques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES9100840A ES2026119A6 (en) 1991-03-26 1991-03-26 Portable system for the protection of spoken information transmitted via the telephone channel using frequency inversion techniques

Publications (1)

Publication Number Publication Date
ES2026119A6 true ES2026119A6 (en) 1992-04-01

Family

ID=8271925

Family Applications (1)

Application Number Title Priority Date Filing Date
ES9100840A Expired - Lifetime ES2026119A6 (en) 1991-03-26 1991-03-26 Portable system for the protection of spoken information transmitted via the telephone channel using frequency inversion techniques

Country Status (1)

Country Link
ES (1) ES2026119A6 (en)

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