Dr. Henry Sinnreich (Richardson, TX) is Chief Technology
Officer at Pulver.com, a leading media company for VoIP and
Internet communication services. Dr. Sinnreich has held engineering
and executive positions at MCI where he was an MCI fellow and has
been involved in Internet and multimedia services for more than 12
years, including the development of the flagship MCI Advantage
service based on SIP. Henry Sinnreich is also a contributor to IETF
standards for Internet communications in such areas as SIP
telephony devices and using RTP extensions for voice quality
monitoring. He was awarded the title Pioneer for VoIP in 2000 at
the VON Europe conference. Henry Sinnreich has been a cofounder and
board member of the International SIP Forum based in Stockholm. He
is a frequent speaker and is known as the leading evangelist,
worldwide, for SIP based VoIP, presence, IM, multimedia, and
integration of applications with communications. Dr. Sinnreich is
also a guest lecturer at the Engineering School of the Southern
Methodist University in Dallas, TX.

Alan B. Johnston (St. Louis, MO) is a Consulting Member
of Technical Staff at Avaya, Inc. He has coauthored the core
Internet SIP standard RFC 3261 and four other SIP related RFCs. He
is the co-chair of the IETF Centralized Conferencing Working Group
and is on the board of directors of the International SIP Forum.
His current areas of interest include peer-to-peer SIP and
security. Dr. Johnston is a frequent speaker and lecturer on SIP
and contributor to various publications, and is an adjunct
professor at Washington University in St. Louis, MO.