A GSM/UMTS emulator is disclosed for emulating a real network so that certain device functionalities can be easily tested. The architecture of such a GSM/UMTS emulator may include a terminal PC and a server. The terminal PC runs the device (including a radio interface layer and a multiplexer). The server acts as the application server to emulate UMTS network performance. Such an emulator may enable testing of both control information and data applications.

 
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