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Interworking apparatus for roaming among different mobile networks

  • US 6,002,931 A
  • Filed: 08/13/1996
  • Issued: 12/14/1999
  • Est. Priority Date: 08/15/1995
  • Status: Expired due to Fees
First Claim
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1. An interworking apparatus for roaming among a plurality of different types of mobile networks using protocols which identify subscribers and terminals in different ways, said apparatus being connected among said plurality of different types of mobile networks comprising:

  • means for converting between protocols of said plurality of different types of mobile networks; and

    means for holding network identity information for identifying a mobile network to which at least one mobile user to be traced is visited.

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