The following text is transcribed from a letter dated December 7, 1999 sent by Lee Vishloff (Director, Product Research). PMC-Sierra, Inc has identified a patent, USA 5835602 - Self-Synchronous Packet Scrambler, which it believes related to RFC2615, PPP over SONET/SDH. In accordance with the intellectual property rights procedures of the IETF standards process, PMC-Sierra, Inc is willing to offer non-exclusive licenses under reasonable and non-discriminatory terms and conditions. Any party wishing to negotiate a license should write to: Steve Perna Director of Transmission and Switching Division PMC-Sierra, Inc. 105-8555 Baxter Place Burnaby, BC Canada V5A 4V7 Phone: +1 694-415-6150 Fax: +1 604-415-6207