Utilizing intrusive and non-intrusive PC Probes at strategic locations in network, NetSurveyorWeb™ identifies, segregates, and analyzes different types of GSM Mobile calls over TDM and IP transport networks. Probes transmit and collect voice, data, protocol, statistics, and performance information and relay information to NMS. Web-based network monitoring and diagnostic system is suitable for billing verification, remote protocol analysis, and traffic engineering.