Hi, since a few weeks I get a delay in the audio from internal to external. When people call us there is no problem. [MS101003] Call(55) Ln:10000@Voipdiscount: Possible firewall problem. Address mapping failed on STUN server 220.127.116.11:3478 for local address ":9000" is it a port problem? Or what? I consider all ports to be open. I did that allready months ago and it was working fine at that time.