GL's UMTS protocol analyzer captures and analyzes various UMTS protocols and performs a range of measurements to troubleshoot complex 3G networks. The tool lets you monitor, capture, decode, and collect essential information across several interfaces, including IuB, IuR, IuC, and IuP. To assist in fault diagnosis, the analyzer simultaneously handles ATM-based AAL2 and AAL5 virtual channels with reassembly. It also supports various control plane protocols, user plane protocols, and NAS protocols, as well as UTRAN-specific protocols. GL Communications, www.gl.com.