Cordless telephone system with security coding

Patent

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Details

179 2E, H04Q 704, H04M 166

Patent

active

045352003

ABSTRACT:
An arrangement for telephone communication via a radio-electric link, characterized in that it is formed by a base unit and a mobile unit which form the fixed part of the arrangement and its optionally movable part, respectively, that the base unit comprises primarily an interface module for the connection to the telephone network, a first radio-electric module for transmitting to the mobile unit signals coming from the telephone network, and for receiving and conveying to this network signals coming from the mobile unit and a first processing module, that the mobile unit (20) comprises primarily a second radio-electric module (220) for transmitting speech signals to the base unit and for receiving signals coming from the telephone network via the base unit, and a second processing module (240) and that the base unit and the mobile unit each comprise a multiplexer and also a contact for interconnecting them during the previous storage by the user in the memory from the mobile part a personal, characteristic code which makes it possible that only the communications between the said mobile unit and the said base unit are enabled.

REFERENCES:
patent: 4422071 (1983-12-01), de Graaf
patent: 4436957 (1984-03-01), Mazza et al.
patent: 4467140 (1984-08-01), Fathauer et al.

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