We're rolling out a site which has almost 100% "softphone" rather than deskphone clients, and many of the users want to work from home or out of office. 3CXPhone Windows client is working fine in-office. BUT Out of office, via the Tunnel, we get perfectly happy registration and call control but often one- or even no-way audio. Firewall is set to pass traffic on 5090, both TCP and UDP, to the server, from any source. It;s also set up to allow 5000 and 5001 for Presence - though I would *prefer* to close 5000 to protect the console!! It seems to make NO difference if I tick the "Disallow use of Extension outside LAN" box - or leave it ticked as that's the default - I assume that's coz the system sees a Tunnel connection as "Lan". It seems to make NO difference if I tick the "Use Tunnel for remote" box in the Extension/3CXPhone tab. Ticked or unticked, it allows the extension to register and call but without audio. Server Event Log does NOT show "no audio received". Have not yet had chance to 'Shark a test connection, that's on tomorrow's to-do list. Kind of hoping before I get to that someone will spot my obvious mistake.