Multi-controller security network

Communications: electrical – Condition responsive indicating system – With particular system function

Reexamination Certificate

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C340S539100, C340S572100

Reexamination Certificate

active

07079020

ABSTRACT:
A security network containing multiple controller functions that communicate using wireless communications. The controller functions are contained within base units. One controller function may be the master controller. Other controller functions may receive a copy of the configuration data contained within the master controller. If the master controller fails, another controller function may become the master controller. The controller functions may use encryption keys to encrypt and/or authenticate communications. Some base units may contain a telecommunications interface. Controller units may relay communications between themselves to reach a telecommunications interface. Controller functions located in different buildings may communicate. Controller functions may each receive wireless communications from a transponder and combine the received communications to reduce errors.

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