This was received electronically on October 9, 2000 From: Malin Gullstrand (ERA) IETF Secretariat c/o Corporation for National Research Initiatives 1895 Preston White Drive, Suite 100 Reston, VA 20191-5434 USA PATENT LICENSE UNDERTAKING Telefonaktiebolaget LM Ericsson would like to clarify its position with respect to patents associated with IETF standards work by making the following general statement: This is to affirm that Telefonaktiebolaget LM Ericsson and its subsidiaries (Ericsson), in accordance with corporate policy, will offer patent licenses on its submissions to the IETF rightfully made by its employees, as follows. All submissions are in conformity with the RFC 2026. If part(s) of a submission by Ericsson employees is (are) included in a standard and Ericsson has patents and/or patent application(s) that are essential to implementation of such included part(s) in said standard, Ericsson is prepared to grant - on the basis of reciprocity (grant-back) whenever applicable - a license on such included part(s) on reasonable, non-discriminatory terms and conditions. Any questions related to this statement may be addressed to: Telefonaktiebolaget LM Ericsson Att: Mans Ekelof SE 126 25 STOCKHOLM Sweden Phone: +46 8 719 5921 email: mans.ekelof@lme.ericsson.se A copy of this letter is sent by e-mail to the IETF Executive Director Steve Coya, scoya@ietf.org TELEFONAKTIEBOLAGET LM ERICSSON (publ) M…ns Ekel÷f Vice President IPR and Licensing 2 (1) 3/CAL 115 758 R1A Date Reference 2000-06-13 Uen 3/CAL 115 758 R1A Date Reference 2000-10-09 Uen Attending to this matter Your Date Your Reference 2000-10-09 Telefonaktiebolaget LM Ericsson (publ) Standardization Mail Office adress Tel: +46 8 757 0000 SE-164 83 STOCKHOLM Torshamnsgatan 23 Fax: +46 8 Reg. No.: 556016-0680 SWEDEN Kista www.ericsson.com VAT No.: SE556016068001