Title: Nortel Networks Limited Statement of IPR relating to RFC 4474 Date: 2010-07-06 Submitter: "Michelle Lee" Dear Sir, Nortel Networks Limited is the owner of patent US no.7,277,533, entitled "Providing calling party information in a request to establish a call session", that may be relevant to an implementation of IETF RFC 4474: Title: Enhancements for Authenticated Identity Management in the Session Initiation Protocol (SIP) Tag: RFC 4474 http://www.ietf.org/rfc/rfc4474.txt Licensing inquiries may be addressed to: Mark Hearn, IP Licensing Nortel Networks 2221 Lakeside Boulevard, M/S 991/14/B20 Richardson, Texas 75082 USA hearnm@nortel.com My contact information is set out below. Michelle Lee Nortel Networks IP Counsel 5945 Airport Road Mississauga, ON Canada L4V 1R9 Email: mleelaw@nortel.com