Antony Oodan is a consultant on QoS in telecommunications. He spent 25 years with BT, where he was responsible for network performance measures. Prior to that, he was involved in the development of long life thermionic tubes for special applications, including the transatlantic cable. He is a physics graduate, a Chartered Manager and a Member of the IEEE.Keith Ward has been Visiting Professor of Telecommunications Business at University College London since January 1992. Prior to that, he spent 44 years with BT, progressing from engineering apprentice to Chief Engineer.Catherine Savolaine is manager of the Service Performance Assurance Division of AT&T. She is responsible for quality planning and evaluation on service offerings over IP networks and hybrid IP/circuit switched networks. Ms Savolaine gained her BA in mathematics from Grove City College and MS in mathematics from Drexel University.Dr Mahmoud Daneshmand is Technology Leader, Chief Scientist Organization at AT&T Labs. He is also Affiliate Professor of the School of Technology Management and Adjunct professor of Computer Science at the Stevens Institute of Technology. Dr Daneshmand has a PhD and MA in statistics from UC Berkeley and an MS and BS in mathematics from the University of Tehran.Peter Hoath is Head of Security at BT Retail. For almost 30 years with BT, he has been involved with network, product and system security and integrity and has represented BT in security forums both in the UK and internationally.