Could some explain how to get working 3CX clients with TLS and sRTP? I tried to use LE certificate for TLS on the server side and there is no any problem with Phonerlite softphone or Cisco SPA, they are connected without any problems. But 3CX clients shows me "TLS error". And it seems "RTP Mode Secure only" didn't worked too. When I make a call it "freezing". There is no incoming call on 3CX clients. Also sRTP didn't work with the system services like Voicemail. I think not only me used remote PBX installation and want encrypted calls over public networks.