The mobile network is evolving to 3 rd generation UMTS where voice, video and data services all reside in one high-speed, spread spectrum radio access network. To satisfy the new requirements of monitoring 3 rd generation mobile radio access and core networks, a new generation of protocol analyzers is required. The Signaling Analyzer family of products is focused on solving the needs of higher intelligence and performance. The solution offers a breakthrough in troubleshooting methodology with a high-performance, client server, multi-user architecture and seamless drill down from statistics and call traces to messages and decodes. This solution allows full and uniform testing of network and individual call performance across all mobile network technologies and call types.