Received May 12, 2000 From: Roy Mills Update Received from "Kevin-LAW Smith" ===== This letter affirms Nortel Networks Limited (Nortel Networks) position with respect to patents that are necessary to IETF standards or specifications. Individuals employed by Nortel Networks are involved in various working groups of the IETF. As a backdrop to any and all such activities, and in accordance with RFC 2026, Nortel Networks provides the following general statement: Nortel Networks may seek patent rights on technology described in a document which Nortel Networks contributes for use in IETF standards discussions or standards track specifications. If such patented technology is essential for the implementation, use, and distribution, of an IETF standard, Nortel Networks is willing to make available nonexclusive licenses on fair, reasonable, and non-discriminatory terms and conditions, to such patent rights it owns, solely to the extent such technology is essential to comply with such IETF standard. Also, to the extent that an essential patent(s) is subsequently identified, Nortel Networks is willing to make available a nonexclusive license under such patents, on fair, reasonable, and non-discriminatory terms and conditions. Similarly, when and if patent applications are subsequently issued, and determined essential to the practice of an IETF standard, Nortel Networks is willing to make available nonexclusive licenses under such patents, on fair, reasonable, and non-discriminatory terms and conditions. The terms apply to those patents for which Nortel Networks has the right to grant licenses. Parties with questions related to this statement, or inquiries in a license, should write to: Kevin L. Smith Senior Patent Counsel Nortel Networks Limited - Standards 2221 Lakeside Blvd M/S 991/14/B50 Richardson, Texas 75082 email: kevinsmi@nortelnetworks.com or to: Stuart Wilkinson Vice President, IP Licensing & Transactions 8200 Dixie Road, Suite 100 GMS 036/NO/151 Brampton, Ontario L6T 5P6 CANADA e-mail: stuartw@nortelnetworks.com