I forgot to tell that my thesis(dutch) is online in the documentation section of the vandeplas.com website. This document (for my master thesis) contains information about the project we did at Siemens. But what is that project? short: SIP Load Generator, long: A system that generates calls for the SIP ( VoIP) protocol. It is used to test VoIP servers and networks. If you have some time, and understand some Dutch, feel free to read the text....