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Congratulations on Purchasing USB-Testbook the SIP Trunk and VoIP Tester for technicians and engineers.

On this page you can find some key resources for getting started with USB-Testbook. The USB-Testbook application has a built in help file/manual that you can access by pressing the Help key in the application, we recommend however that you download a copy of the PDF document using the link below in order that you can refer to this document whenever you need to.

There are also a number of Videos available that are hosted on YouTube