I have a new FreePBX 15 installation with Asterisk 16.
I have a Yealink T54W that is working on another FreePBX install and am using that to experiment with the new installation.
On the new install I set up Let’s Encrypt. I set up an new PJSIP extension and attempted to configure the phone to work with that configuring a TLS connection.
The phone would not register. So I set up another extension, all the same parameters except as a SIP extension. Using TLS the phone WILL register on that extension.
On the phone side I’m just changing the register name and username to the other extension and it will register, change it back to the PJSIP extension and it fails to register.
Does that rule out certificate problems?
What am I missing?