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Data transmission apparatus to be connected to multiplexed transmission line

  • US 5,056,090 A
  • Filed: 05/09/1989
  • Issued: 10/08/1991
  • Est. Priority Date: 05/10/1988
  • Status: Expired due to Term
First Claim
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1. A data transmission system, comprising:

  • multiplexed data transmission means, including a plurality of transmission channels, for transmitting the same data through the plurality of transmission channels at a normal time;

    first data check means, connected to said data transmission means, for making an error check with respect to data transmitted through the transmission channels;

    selection means, connected to said data transmission means, for selecting one of the transmission channels to receive data transmitted through the selected transmission channel and for outputting the received data;

    second data check means, connected to said selection means to receive data output therefrom, for making an error check with respect to the data output from said selection means; and

    determination means, connected to said first and second data check means, for determining that an error is caused as a result of switching of transmission line selection performed by said selection means during data reception, if the error is detected by said second data check means without being detected by said first data check means.

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