Hi, I have a strange problem with my conference setup on freeswitch. my setup is as followed: - freeswitch quick and dirty installation according to http://wiki.freeswitch.org/wiki/Quick_and_Dirty_Install - freeswitch release: svn-17188 - http://wiki.freeswitch.org/wiki/Examples_JavaScript_Conference_IVR, - made my DNS SRV records - account from iptel.org - "phoner" softphone - UDP ports are opened inbound from 5060 till 64000 on the firewall, which is in front of the FS box - all udp ports outbound are open on the firewall - the FS box uses a public IP Well, I can dial the SIP URI. The connection is working. I can hear the IVR. Well, sometimes at least. I make a call => I can hear everything. Seconds later, I make a call with the same client on the same PC => audio is coming through. I cancel the connection and make the call again => there´s no audio coming through, and so on... When I do 10 calls within 20 seconds with 4 ones there´s no audio. According to wireshark the inbound RTP stream is sometimes missing on some calls. According to freeswitch debug, the used RTP ports are alway between 5062 and 64000 It sounds like a firewall problem with closed port. But it can´t as the firewall ports are opened. Any ideas what else could be wrong? Chris