It says v18.104.22.168, from stable release.
Q: Where and which Zulu Apps your are seeing this issue ? ( Zulu Mobile or Desktop )
I haven’t tried the mobile version yet - I was on my desktop, macOS 10.15.5
Q: Which version app Mobile and Desktop you are using ?
It was the latest one available as of yesterday. The app shows: v3.5.2+215
And you can activate OPUS Codecs on your PBX.
I did have OPUS enabled. My SIP provider supports it, and I am making an effort to use it.
Also you can try to use if not setup STUN Server on your PBX. You can try to activate and try it.
You know, I thought about if this could be the issue. I thought, Zulu is only supposed to use 10000:20000 for RTP, so it shouldn’t be the problem, but worth a try? I had enabled “Sangoma STUN” and “Sangoma TURN” in the Zulu tab of the group preferences for this user. It didn’t make any difference for whatever reason, so last night before I shut down I turned them off.
I did however navigate to the page you showed in your screen shot (thank you @shahin ), and it showed a link to a list of public STUN servers. I saw the one you listed was first on the list, so I put it in, and HOT DANG, it works now. Go figure!!!
Thank you, Zulu is good now, I just need to figure out why I can’t dial in UCP.