Desk phone (Yealink T21P E2) stopped ringing for incoming

[danimal]

I have a Yealink T21P E2, firmware v 52.83.0.20 (latest) fully provisioned, works fine for outgoing calls. Suddenly it stopped ringing for incoming calls. It is not on DND. I'm not missing any calls because the 3CX Mobile app works. But there are times when I want to answer on the desk phone.
Not sure what I'm missing here or perhaps something is wrong with the phone itself. Thanks all!

 

[phonemaster]

I have a Yealink T21P E2, firmware v 52.83.0.20 (latest) fully provisioned, works fine for outgoing calls. Suddenly it stopped ringing for incoming calls. It is not on DND. I'm not missing any calls because the 3CX Mobile app works. But there are times when I want to answer on the desk phone.
Not sure what I'm missing here or perhaps something is wrong with the phone itself. Thanks all!

Hi danimal,
Can you see your phone in 3cx management console -> Phones page?
To troubleshoot your problem do the following:
1. In parallel start the network captures on the 3cx PBX (Dashboard->Activity Logs->Capture) and your yealink phone (Settings->Configuration->Pcap feature).
2. Make a call to that extension, answer and close.
3. Stop and download both captures.
4. Open them using the Wireshark and check - do you have an INVITE SIP message from the PBX to yealink phone?
a) If yes, this means PBX is Okay and you have something enabled on the phone side. Reset and re-provision it again.
b) If not, this means that you have something enabled on the PBX side. Check the extension settings.

If everything is Okay and correct, then you are right and probably your yealink phone is broken now.

 

[YiannisH_3CX]

In addition to what @phonemaster suggested try dialling *60 on the device and see if that resolves the issue.