Yealink T54S BLF with TLS

[NL-ICT]

How can we configure the BLF function on the Yealink T54S over remote stun connection with TLS enabled? As soon when we connect the phone internally BLF works perfectly. Lights are working etc. However when we connect it externally the phone registers, make and receive calls, dnd works after using the Outbound proxy setting (not before). However the lights for BLF remain off. When you press the line it will call the person behind the button but we cannot see anymore if the person is in a call.

The BLF settings in advanced are empty as the picture attached.

 

[Saqqara]

Similar issue -
https://www.3cx.com/community/threads/yealink-t46x-direct-stun-tls-srtp-no-blf.59142/

 

[YiannisH_3CX]

Hello @Marco Bankers

I was able to replicate the issue using a T56s and TLS provisioning. The issue however does not affect all Yealink phones as 2 other devices i tried worked.
We have contacted Yealink about this so they can check as well and confirm the issue. If a solution is provided i will let you know. You can also contact Yealink directly and report the issue.