onferencing transmitted over ATM and IP networks, having worked on a 1998 project funded in the United Kingdom by BT. This earlier work has inspired projects investigating a number of issues with transmission of the next generation of voice applications over packet networks ranging from network-level traffic control to signal-processing requirements such as echo cancelation. Emilio Hugues Salas, M.Sc. University of Essex Emilio Salas received his master's degree in telecommunications and information systems from the University of Essex in 2002. He is currently pursuing his Ph.D. degree at that uni- versity. Since June 2006, Emilio has been a research officer on the IST European Project, MUSE, and has worked for ALCATEL Mexico as a product and network design engineer in the transmission networks area. Emilio has been a reviewer for various journals and has published more than 15 papers in scholarly journals and conference proceedings. Matthew R. Thomas, B.Eng. University of Essex Matthew Thomas studied electronic engineering at the University of Hertfordshire, graduat- ing in 1994 with a B.Eng. He began configuring routers for the IBM Global Network in 1995 and gained CCIE status in 1996. From 1996 Matthew has specialized in running CCIE boot camps and OSPF training courses. As a contractor, he has worked in the Far East and South America and has spent extended periods in Switzerland, Brussels, and the United Kingdom. Today Matthew is working toward his Ph.D. in the Department of Computing and Electronic Systems at the University of Essex. Along with carrying out research in Internet routing protocols and carrier-class Ethernet, he teaches mathematics courses in the department. Eur. Ing. Paul Urquhart, B.Sc., M.Sc., DIC, Ph.D., C.Eng., MIET Universidad Pública de Navarra Paul Urquhart is a senior fellow at the Universidad Pública de Navarra, Pamplona, Spain, and a visiting professor at the University of Essex. He was educated at the University of Edinburgh, Imperial College (London), and the University of Glasgow,