Anritsu Company introduces a Network Simulation Library (NSL) for its MD8480B signaling tester that allows developers and manufacturers of W-CDMA 3G user equipment (UE) to efficiently conduct pre-validation of Interoperability Testing (IOT) between 3G UE and the world's various 3G networks. The NSL increases the MD8480B's analysis capability to include voice, packet (IP/PPP), video call, short messaging service (SMS), and multicall services, reducing the cost of IOT. In addition to being based on actual operational experiences, the NSL test scenarios are in full compliance with the most recent 3GPP specifications. The Windows-based NSL makes it simple for engineers to execute test cases and perform highly accurate verification tests in a GUI (graphical user interface) environment. A suite of test cases can be selected via a single click, and the test case categories are displayed in a familiar tree view, allowing for fast test case execution. Test case contents and progress can be monitored through sub-windows, while UE operating procedures are displayed in pop-up windows.