I have a Fanvil i62 door phone provisioned by 3CX and it works really well.
The only issue is that whenever 3CX updates, like the recent update to V20 U6, the door phone automatically reprovisions, and I lose the speed dial for when someone pushes the single big button on it. The settings in...
I implore you to copy the below request to the ideas forum (and everyone else please go there and vote for the change). Personally I feel this would be a simple change with no possible negative impact. If I'm missing something, please feel free to share.
In the default Yealink provisioning...