Problem with 3CX App

[DJDelcourt]

Hello,

I have issue with the 3CX app. When my team and I receive a call on the app, our extension won't show as occupied on our IP Phone.
If we make the call using the app, our extension become occupied as it should be.
The IP Phone in question is the Yealink T48S.

Thanks in advance for your help.

 

[Shadi Bamalhs (ECOLOR)]

Please add more clarification.