Unable to make calls - Path Busy - Yealink W60B/W56H

[JacoLange]

Recently client is getting an error on a W56H handset, it says
Error Message “Global Error” and “ Path Busy”
They can’t answer incoming calls and also they can’t call out.

I traced it back to a power dip on the W60 Base, after I logged on to the base, calls started to work again, very difficult issue to pin point, on the base SIP was registered
So this point to a issue between the Handset and the base.

I asked the client to Switch off the Handset as well after a power dip to mitigate the issue.

I have setup external logs and could see this from the base station.



Does anyone have advice how to resolve this

I see there is other customers that also complains about this
Other issue

Phone and handset is on the latest firmware as of oct 2021

Thanks
Jaco