Fred Goldstein, principal of Ionary Consulting, advises companies on technical, regulatory and business issues related to the telecommunications and Internet industries, especially in areas where they overlap. He assists service providers in network design, business modeling, planning, and technical architecture, and provides focused market needs analysis to equipment vendors. He has frequently been an expert witness in intercarrier compensation and network interconnection cases. He has worked on a range of telecommunications and networks-related activities at Arthur D. Little Inc., BBN Corp., and Digital Equipment Corp. He has worked with enterprise networks on a wide range of matters such as backbone network design, voice systems planning, and traffic engineering. The author of numerous articles and the books The Great Telecom Meltdown and ISDN In Perspective, he has served on standards committees in areas such as ATM networks and Frame Relay, and has taught courses for Northeastern University and National Technological University.