Yealink phone and bad echo

[Callinectes]

We have a need for an SBC for a customer with an employee working from home. Previously the employee had the SBC software running in Windows and a Yealink T46 which worked fine but the computer running the SBC was behind the phone which made for some weird troubleshooting problems. We decided to replace the T46 with a T53 configured as an SBC phone. The user has swapped out the T46 for the T53 router phone and now the user has reported that on every call the caller/called party can hear themselves echo after they talk. The user does not hear an echo, only the other end of the call hears themselves being repeated. We tested this and can confirm that it is happening and it is very clear. It does not happen on speakerphone calls, only on calls where the T53 user uses the handset. We had them swap to the T46 handset (still using the T53 phone) and the echo was still present. There is no echo when they swap back to their T46. Can someone tell me why this is happening with the T53 and not the T46? Is the configuration profile for the T53 missing an echo suppression setting perhaps?

 

[TheodorosG_3CX]

@Callinectes Note that we did not had such reported issues. Now the fact that you experience this does not mean that is a 3CX issue. Our recommendation is to contact Yealink as this can be related with network or even a faulty device.

 

[JohnS_3CX]

You should just take it back from the user and see if you can replicate it yourself:

- Ensure you have the firmware 3CX provides
- Ensure handset is plugged into the handset port (not headset port)
- Factory reset and reprovision on fresh extension - don't change any settings on the device or connect any peripherals
- Make some internal calls and see if you have echo, and some external ones and compare results
- If external only, then it could be trunk related, if both then it's probably the device.

Loudspeaker mode will obviously not suffer from this, phones have aggressive echo cancellation in this mode but not in handset mode for obvious reasons

 

[jonathanp1]

Did you ever solve this problem? I have a t57W with bad echo issue.

 

[Callinectes]

Did you ever solve this problem? I have a t57W with bad echo issue.

No, we never resolved it. We believe it is a problem with the hardware since no matter what settings we changed, parts/accessories we swapped out, or what firmware we reverted to, the problem would not go away.

 

[jonathanp1]

I'm going to try running with the settings below disabled on the T57w:

Current:


NEW TEST SETTINGS:

 

[Callinectes]

I'm going to try running with the settings below disabled on the T57w:

Current:
View attachment 39725

NEW TEST SETTINGS:
View attachment 39726

I am fairly certain we tried every different setting iteration, but please do let me know how it goes for you.

 

[Callinectes]

I'm going to try running with the settings below disabled on the T57w:

Current:
View attachment 39725

NEW TEST SETTINGS:
View attachment 39726

Did you ever fix this problem? I just updated this phone to the newer firmware and it did not help.