Wireless telephone with frequency inversion scrambling

Details Wireless telephone with frequency inversion scrambling Wireless telephone with frequency inversion scrambling

H - Electricity

04

K

H04K 1/04 (2006.01) H04M 1/00 (2006.01) H04M 1/19 (2006.01) H04M 1/21 (2006.01) H04M 1/725 (2006.01)

Patent

CA 2075257

The wireless telephone of the present invention is comprised of a base unit, coupled to a land-line telephone system, and a remote unit that communicates with the base unit over radio frequencies. The remote unit has scrambling circuits (207 and 216) for encrypting voice signals transmitted to the base unit and decrypting voice signals received from the base unit. The base unit also has scrambling circuits (107 and 116) for encrypting voice signals transmitted the remote unit and decrypting voice signals received from the remote unit. The wireless telephone uses a keypad (222) for initiating a demonstration mode that allows both parties to the conversation to hear the scrambled voice signal.

Téléphone sans fil comprenant un bloc de base, couplé à un système téléphonique de câble terrestre, et une unité à distance qui communique avec le bloc de base au moyen de radiofréquences. L'unité à distance est dotée de circuits brouilleurs (207 et 216) pour le cryptage de signaux vocaux transmis au bloc de base et pour le décryptage de signaux vocaux reçus du bloc de base. Le bloc de base comporte également des circuits brouilleurs (107 et 116) pour le cryptage de signaux vocaux transmis à l'unité à distance et pour le décryptage de signaux vocaux reçus de l'unité à distance. Le téléphone sans fil utilise un clavier numérique (222) pour lancer un mode de démonstration qui permet aux deux interlocuteurs d'entendre le signal vocal brouillé.

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