FreePBX, Yealink T48G and TLS/SRTSP - inbound calls not working

[cmariotti]

I have setup a new installation and would like to try to get TLS/SRTSP working on it with a Yealink T48G (latest Firmware)…

Since this is my first time, I wasn’t able to find any walkthroughs on setting this up, the closest I found was this:

TLS and SRTP

Cloud Hosted FreePBX (Public IP) FreePBX: 15.0.16.53 Asterisk: 16.9.0 I have recently switched over and started using a different provider (Voyant -> Twilio) because they are discontinuing their SIP trunking services. I also wanted to implement secure trunking, which has worked, no problem. So it seems I can accomplish TLS/SRTP from server to provider. But I am having difficulty accomplishing the same from server to endpoints, which are all Yealink T48S phones. Currently they will register an…

I seem to be able to make outgoing phone calls without issue (icon on phone screen has a little lock on it), however, inbound calls seem to be going to unavailable voicemail.

Any suggestions on where to start?