[Montevecchi] Hi Olle As impairment emulator I am using NetDisturb, but it is not free. As PESQ Tool I use PESQ Tool from Psytechnics. Anyway PESQ is patented by Psytechnics and Opticom, so I thinks only these companies can provide PESQ. Massimiliano Hi Massilimiano, we are also looking into Network Impairment emulators and PESQ tools. What are you using and could you make any recommendations? BR/Olle