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EP0239455A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Device for preventing violation of a telephone line

Assignee: France Telecom R&D SA
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Filing: 1987-03-06
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Granted: —
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Expires: 2007-03-06
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Abstract

Abstract Translated from French Le dispositif comprend un filtre (24) apte à détecter l'apparition du signal d'invitation à numéroter, un circuit (25) émettant une suite de signaux de numérotation vers l'autocommutateur, la suite étant choisie de telle sorte qu'elle soit considérée par l'autocommutateur comme une fausse numérotation ou une numérotation interdite. La numérotation depuis un poste intrus (12') devient impossible. The device comprises a filter (24) capable of detecting the appearance of the dialing invitation signal, a circuit (25) transmitting a series of numbering signals to the automatic switch, the series being chosen so that it is considered by the automatic exchange as a false numbering or a prohibited numbering. Dialing from an intruder station (12 ') becomes impossible.

Inventors

  • 👤 Jean-Louis Centomo
  • 👤 Georges Morvan
  • 👤 Jean-Yves Moullec

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-04 22:31
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/68

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

EP0126496A2 Cited
DE3312625A1 Cited

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