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Abstract

A distributed data processing system and method for intertransmission of information signals between a central processor and one or more remote computer controlled terminals which includes inputting information signals to the processor and remote terminals for generation of information data at the processor and remote terminals respectively, addressing each of the remote terminals by generation of unique address data at the processor, directing a function of an addressed remote terminal by generation of identifiable function data at the processor and informing the processor of the status of the addressed remote terminal by generation of identifiable status data at the terminal in response thereto, developing complementary data in conjunction with the generation of address, function, status and information data, transmitting the address, function and status data with the complementary data thereof between the processor and remote terminals, transferring the information data and complementary data thereof between the processor and the selected remote terminal in response to the function data, verifying the address, function, status and information data with the complementary data thereof. Also provided is a system and method for verifying the reception of valid data from a signal transmitter which includes a generating a data signal, developing a complementary signal at the transmitter corresponding to the data signal, transmitting the data and complementary signals to a signal receiver and comparatively relating the data and complementary signals whereby the data signal is disregarded by the signal receiver if not in correspondence with the complementary signal.

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First Claim