Hello dear readers I know... there are quite a few posts regarding audio problems however I could not find a solution for what I'm fighting with. My 3CX Version 7 is sitting in a DMZ on a public IP. The phones (all Linksys) are sitting in the LAN on a private address. VOIP provider and phone are all shown as "registered". Stun has been turned off. Internal calls work fine. Incoming calls from outside work fine. The only problem are outgoing calls to an external number: In that case there is no audio on the internal phone. The external phone can hear me but not the internal can't. Does not make sense to me, specially because audio is fine when the call is initiated externally. Any ideas?