Yealink T21P E2 making noise after 3CX provisioning

[454ss]

Hello all,

So I auto-provisioned this phone and as soon as it finished booting up it started making this odd high-pitched feedback type noise. Any guesses on the cause/fix?

Noise demonstrated here:

 

[Saqqara]

Please provide more info on your setup - https://www.3cx.com/community/threads/information-to-provide-when-requesting-help.67558/

 

[complex1]

It sounds like you are having issues with your phone handset/receiver.
Replace the handset and try again.

 

[cobaltit]

I couldn't hear it on my work PC. I'll listen again with a headset when I get home. How is the phone powered? And if you factory reset it does the noise stop?

 

[AWS2P]

it's obviously an helicopter starting it's turbine inside , wait until out of kerosen, noise will stop

 

[454ss]

I couldn't hear it on my work PC. I'll listen again with a headset when I get home. How is the phone powered? And if you factory reset it does the noise stop?

It is powered via POE.
I never had any noise until the phone was provisioned. I have tried changing firmware versions, which has not made any difference.

Really wondering if a setting somewhere could be causing this, or is it more likely a hardware problem.

Edit: I have also factory reset the phone numerous times, and the problem remains.

 

[454ss]

Please provide more info on your setup - https://www.3cx.com/community/threads/information-to-provide-when-requesting-help.67558/

 

[leejor]

Do you have another (identical model) to provision, using the same settings? Or...swap provisioning with another, working set, to see if the issue stays with the set, or follows the provisioning.

 

[AWS2P]

Not sure it may help in your case but STUN is not a supported way on 3cx cloud instances, you need to use SBC only.

 

[454ss]

Hello all,
Thank you for your help. I installed a SBC on the network and provisioned the phone using the new method and everything works well with the phone now, no strange noises.

 

[AWS2P]

Well done , you stop the engine