The GSM / GPRS Signaling Advisor is a software application designed to run on a dedicated mainframe. The resulting instrument isolates the relevant messages faster, making it easy to troubleshoot problem calls. This package supports all of the protocol stacks required for monitoring GSM Phases 1, 2, 2+ including CAMEL and GPRS, as well as basic wireline network signaling. Add any appropriate optional decodes and link interface modules and you're ready to test across multiple links involving different protocol standards, e.g. at access network interfaces. At the heart of each GSM / GPRS Signaling Advisor, the intuitive graphical user interface makes measuring and understanding results easy, speeding diagnosis of network problems.