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Adaptation device and method for efficient interconnection of data processing devices and networks

  • US 5,323,392 A
  • Filed: 02/19/1992
  • Issued: 06/21/1994
  • Est. Priority Date: 03/13/1991
  • Status: Expired due to Fees
First Claim
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1. An adaptation device for efficient interconnection of at least one first data processing device or network interface, complying with a first communication protocol of the HDLC type at the layer 2 of the OSI model, and at least one second data processing device or network interface, complying with a second communication protocol of the HDLC type, said at least one first and second data processing devices or network interfaces being connected to said adaptation device, said adaptation device comprising:

  • storage means for storing a HDLC frame incoming from said at least one first data processing device or network interface, andmeans for checking the FCS Field of said HDLC frame, and discarding said frame when said checking fails, and being characterized in that the adaptation device further comprises;

    means for extracting a destination information from the Address Field of said HDLC frame,means for converting within said storage means, all parameters in said Control Field and Address Field, from a first bit representation according to said first communication protocol, to a second bit representation according to said second communication protocol,means for forwarding the converted frame, including said converted Control Field and Address Field and an unchanged Information Field, from said storage means on to said at least one second data processing device or network interface, according to said destination information, andmeans for computing a new FCS and filling the FCS field when forwarding the converted frame.

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