I’m running FreePBX 14 and 15 within a VM. The Yealink can connect to the v14 but is unable to connect to the v15.
The only “clue” I see about the connection is -
devicestate.c:361 _ast_device_state: No provider found, checking channel drivers for PJSIP - 301
The v15 is pretty much untouched in regards to any configurations. I did add a trunk and that seems to work on v15
Yealink FW - T46-28.83.0.120 (also tried T46-28.83.0.50)