Title: Nortel Networks Statement about IPR claimed in RFC 3303 Received: 25 November 2004 From: Michelle Lee Dear Sir, Nortel Networks Limited has an issued patent that is believed may pertain to at least a portion of RFC 3303: Title: Middlebox communication architecture and framework Tag: http://www.ietf.org/rfc/rfc3303.txt Nortel Networks U.S. Patent No. 6,772,210, entitled "Method and apparatus for exchanging communications between telephone number based devices in an internet protocol environment", may contain claims that are believed may be necessary for practicing the resulting IETF Standard. In this regard, Nortel Networks will make available licenses on fair, reasonable, reciprocal, and non-discriminatory terms, including royalties and/or other payments, to such necessary claims it owns for the purposes of complying with the resulting IETF Standard. Licensing requests may be addressed to: Richard Weiss Nortel Networks 2221 Lakeside Boulevard, M/S 991/14/B20 Richardson, Texas 75082 USA weissr@nortelnetworks.com My contact information is set out below. Michelle Lee Nortel Networks Intellectual Property Law Group 8200 Dixie Road, Ste 100 GMS 036/NO/151 Brampton ON, Canada L6T 5P6 Tel: (905) 863-1148 (ESN 333) Fax: (905) 863-8431 (ESN 333) Email: mleelaw@nortelnetworks.com