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Apparatus and method for data communication on packet-switching network

  • US 7,315,543 B2
  • Filed: 01/16/2004
  • Issued: 01/01/2008
  • Est. Priority Date: 05/19/2003
  • Status: Expired due to Fees
First Claim
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1. A packet-switched communication apparatus which forwards packets pertaining to communication setup between two client terminals, one terminal being attached to a first network and the other terminal being attached to a second network, wherein said first network which carries packets by using a first protocol and said second network which carries packets by using a second protocol are connected via an address translator,said packet-switched communication apparatus comprising:

  • mapping retaining means for retaining mappings between network-dependent parts of addresses which are used in said first network and address translators;

    address translator selecting means for selecting one of said address translators, based on an address included in a received packet;

    address obtaining means for obtaining a substitutive address to replace the address included in the received packet from the selected address translator; and

    address replacement means for replacing the address included in the received packet by using the obtained substitutive address.

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