Nortel Networks Statement about IPR in RFC 3489
Date: 14 January 2008
From: Michelle Lee <mleelaw@nortel.com>

Dear Sir,

Nortel Networks Limited has an issued US patent no. 6,993,595, entitled
"Address Translation Change Identification", that may be relevant to at
least a portion of this proposed IETF RFC 3489 standard if approved and
implemented:
Title: STUN - Simple Traversal of User Datagram Protocol (UDP) Through
Network Address Translators (NATs)
Tag: RFC 3489 http://www.ietf.org/rfc/rfc3489.txt?number=3489
As understood, RFC3489 is identified as a proposed standard but will be
obseleted by the proposed IETF Internet draft-ietf-behave-rfc3489bis-13,
Session Traversal Utilities for (NAT) (STUN), if such draft is approved
as the resulting IETF standard.
My contact information is set out below.

Kind Regards,
Michelle Lee
IP Counsel
Nortel Networks Limited
5-195 The West Mall
Toronto, Ontario Canada M9C 5K1
Fax: 905-863-1986
mleelaw@nortel.com