Runing a UAc (Win Mess. 4.6 or eStara) behind a NAPT with pinholing on certain ports, I cannot transfer voice. (the call establishment is fine, while the sip ports are open, in the NAPT). Is there any way of finding the RTP ports of the above mentioned UAs (or any other UA), in order to open the relevant ports on the NAPT router ? Regards, George