Hi there, I'm trying to call external video endpoints using Direct SIP. Internally I can do video calls both using internal extensions or direct sip addresses, but when I can external endpoints the call is audio-only. Firewall configuration is OK. Test shows everything as "done" and SIP alg is not detected. 3CX is using a 1-to-1 NAT public IP and all ports are open. If I call the same endpoints without 3CX in the middle, the call shows video as it should, so I know both endpoints do have common codecs and inter-operate. Any idea what can be the problem? Thanks.