Okay, never mind... just if I would look in the damn debug log file sooner. dammit! :evil: So after tweaking the SDP a bit to not omit any mandatory SDP parameter, it still does not work. I do have implemented all mandatory: v, o, s, t, m and c. v=0 o=- 0 0 IN IP4 192.168.1.4 s=Test Session t=0 0 c=...