Title: Nortel Networks Statement about IPR claimed in draft-akhtar-sipping-header-reduction and draft-akhtar-sipping-3g-static-dictionary Dear Sir, Nortel Networks Limited has potential intellectual property rights in an invention that may pertain to at least a portion of the subject matter of these IETF Internet Drafts: 1. Title: New SIP Headers for Reducing SIP Message Size draft-akhtar-sipping-header-reduction-00.txt Tag: < draft-akhtar-sipping-header-reduction-00.txt > http://www.ietf.org/internet-drafts/draft-akhtar-sipping-header-reductio n-00.txt 2. Title: 3G Wireless Support in the SIP/SDP Static Dictionary for Signaling Compression (SigComp) draft-akhtar-sipping-3g-static-dictionary-00.txt Tag: < draft-akhtar-sipping-3g-static-dictionary-00.txt > http://www.ietf.org/internet-drafts/draft-akhtar-sipping-3g-static-dicti onary-00.txt In the event that the technology in either of these documents is included in a standard adopted by IETF and an unpublished patent application of Nortel issues which contains claims that are necessary for practicing the resulting IETF Standard based on either of these Internet Drafts, Nortel Networks will make available licenses under fair, reasonable, reciprocal, and non-discriminatory terms under such necessary claims it owns to fully comply with such IETF Standard. My contact information is set out below. Kind Regards, Michelle Lee Counsel, IP Law Nortel Networks Limited 8200 Dixie Road, Ste 100 GMS 036/NO/151 Brampton, Ontario Canada L6T 5P6 Tel: 905-863-1148 Fax: 905-863-8431 Email: mleelaw@nortel.com