Yealink T21 Call Pickup issue

[srane.sushant]

Hello Matts

Whenever I picked call using *8 (Code Changed) ringing on another extension. My Voice gets the echo and another party is unable to hear my voice.
For Example.

A Call B (But but "B" is not on his desk) So C picked up a call from his phone using *8 (In this case C is unable to communicate to A and C can hear his own voice(Echo)).

Checked on Yealink

T21
T22P
T23
T21 P E 2

All Same issue

 

[cobaltit]

https://www.3cx.com/community/threads/information-to-provide-when-requesting-help.67558/

 

[srane.sushant]

https://www.3cx.com/community/threads/information-to-provide-when-requesting-help.67558/

• 3CX Version, 16.0.389 Enterprise Annual
• Server OS, Debian 9
• Is the 3CX Server Hosted and where? Azure
• IP Phone Make Yealink /Model T22p /Firmware 7.73.0.50
• Provisioning Method: VPN
• Gateway Make/Model : Grandstream GXW410X PSTN Gateway
• Has the Firewall Checker passed: YES
• Are custom Phone Templates being used: NO (I did Auto provision) Not sure what you're referring too.

 

[cobaltit]

Thanks for that. So that all looks good. Just to rule out any other issues would you mind upgrading to Update 4 for 3CX and also upgrading your phones to the latest supported firmware. They should be on 7.73.0.60. Since you are on VPN (phone configured as local) you should be able to upgrade via 3CX.

 

[JohnS_3CX]

Please proceed to upgrade your firmware as @cobaltit mentioned.

You should not be running on the alpha version of 3CX. I suggest to downgrade the system to our latest stable edition. You will need to take a full backup off of the machine and reinstall the system using the backup during the installation.

 

[cobaltit]

Good catch. I read that as Update 3 not the Update 5 alpha