Received July 26, 2002 From: "Dawna Hoerle (LCA)" This is to advise the IETF that Microsoft believes it may have patent rights (patent(s) and/or patent application(s)) that relate to the technologies discussed in these submissions. Microsoft is willing to negotiate licenses with interested parties to such patent rights as follows: If Microsoft's contribution(s) is(are) included in an IETF standard and Microsoft has patent rights that are essential to implement such standard, Microsoft is prepared to grant a license to the necessary claims of Microsoft patent rights, to the extent that such claims are required to implement that IETF standard, on a royalty-free basis with other reasonable and non-discriminatory terms and conditions, provided a reciprocal license is granted to Microsoft for any patent claims necessary to implement the following IETF NAT-Traversal drafts: and . Microsoft's contribution and the information contained herein is provided on an "AS IS" basis and the contributors and Microsoft Corporation DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Any questions regarding this communication should be directed to: Microsoft Standards Group c/o Dawna Hoerle Microsoft Corporation One Microsoft Way Redmond, WA 98052 dawnah@microsoft.com