Hi, we are planing to connect 5-6 offices (EU-wide) to our VoIP-server in Germany. Some of the offices are connected via OpenVPN (pfsense based) however the others should communicate encrypted as well. Has anybody experiences with this setup?: analog DECT-handsets --> AVM (SRTP/TLS)--> 3CX Free (SRTP / TLS) --> Povider (freevoipdeal, Sipgate, Easybell) SRTP und TLS should/will work of course internal only. At external calls it makes no sense anyway... Thank you for your feedback. I.