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Data exchange, data terminal accommodated in the same, data communication system and data communication method

  • US 5,912,877 A
  • Filed: 11/08/1995
  • Issued: 06/15/1999
  • Est. Priority Date: 12/07/1994
  • Status: Expired due to Fees
First Claim
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1. A data exchange accommodating plural data terminals via terminal trunks and including transit trunk control means for transferring selectively data to be transferred from the terminal trunk to a standard transit line or a backup transit line, said transit trunk control means connected to said standard transit line transferring data to a predetermined transfer destination in a transit system, and said backup transit line which transfers data alternately to the predetermined transfer destination, said data exchange comprising:

  • congestion status detecting means for detecting a congestion status in said standard transit trunk;

    said transit trunk control means having first alternate control means to transfer alternately data to be transferred using said backup transit line, based on detection information from said congestion status detecting means; and

    alternate priority setting means sets priority to data link identification information of every terminal trunk; and

    wherein said first alternate control means performs an alternate control to said backup transit line, based on the priority set by said alternate priority setting means.

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