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Method and system for error correction using asynchronous digital facsimile protocol

  • US 5,440,405 A
  • Filed: 07/21/1993
  • Issued: 08/08/1995
  • Est. Priority Date: 09/02/1992
  • Status: Expired due to Term
First Claim
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1. A method for operating a communication system, including a calling apparatus and a called apparatus, for transmitting data therebetween over an asynchronous digital network during a transmitting process in accordance with a protocol standard, wherein the calling apparatus and the called apparatus generate a plurality of command frames and at least one data frame during the transmitting process, the method comprising the sequential steps of:

  • (a) exchanging, between the calling apparatus and the called apparatus, a plurality of preliminary command frames representative of handshake protocol information including error correction method ECM capabilities;

    (b) initiating an error correcting operation;

    (c) transmitting a data set, including at least one data frame having associated data frame identification information, between the calling apparatus and the called apparatus; and

    (d) verifying receipt of the data set.

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