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Text File  |  1999-10-21  |  429b  |  13 lines
  1. By varying the frequency shift of the transmitted signal according to a predefined algorithm 
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  3. By transmitting each data character twice, since there is no specific acknowledgment of reception
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  5. By transmitting a special FEC algorithm which the receiving station uses for data validation
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  7. By transmitting blocks of 3 data characters from the sending station to the receiving station which the receiving station acknowledges
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  11. 3
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