Secure access telephone extension system and method

Details Secure access telephone extension system and method Secure access telephone extension system and method

H - Electricity

04

M

H04M 1/72 (2006.01) H04B 3/54 (2006.01) H04M 1/68 (2006.01) H04M 9/02 (2006.01)

Patent

CA 2155220

A method and system is provided for conducting secure power line carrier communications in full duplex over the power lines of a building. The method employs system control logic for (A) multiple extension arbitration logic, (B) privacy from eavesdropping and (C) security from third party central office line capture by means of a digital messaging system in each base (2) and extension (4) unit utilizing a unique and matching security key (preamble) with each message instructing the system to change operating states. Matching of the random security codes may be initiated by the user. By this means unauthorized access to the central office line (especially for long distance calls) and eavesdropping by other users in the same building with similar line carrier telephone extension products is prevented.

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