3CX Phone System and Yealink T22P

[icttech40]

On my home 3CX phone system i have 3 Yealink T22P ip phones.
When i make a call there is no ring sound on the T22P, the call receiver phone ring and when pickup there is no sound.

So when i make a call, the call connects to the phone that is receiving the call but no voice, no sound.

i'm calling from a sip trunk.

What changes do i need to sofl this problem?

Regards

 

[JohnS_3CX]

Hello,

This really depends on how the whole system has been set up.
Please read this and give us some more details so we can understand your type of installation:
https://www.3cx.com/community/threads/information-to-provide-when-requesting-help.67558/

 

[icttech40]

Hi JohnS_3CX,

• 3CX Version, 18.0 (Build 314).
• Server OS, Windows 10 Pro.
• Is the 3CX Server Hosted and where? On-premises.
• IP Phone Make/Model/Firmware version, Yealink T22P version 7.73.0.60
• Provisioning Method: Local Lan
• Trunk Provider or VoIP Gateway Make/Model, SIP-Trunk.
• Has the Firewall Checker passed: YES. Only some port number from 9000 to 9398 has a full cone test faile Not all, just a few. most of them are done.
• Are custom Phone Templates being used: NO.

Regards

 

[JohnS_3CX]

Ok, and if you make internal calls (extension to extension) do you have full 2-way audio?

 

[icttech40]

Ok, and if you make internal calls (extension to extension) do you have full 2-way audio?

YES, that works fine.

 

[JohnS_3CX]

Ok great, this means your phones and PBX should be just fine.

The firewall checker failing however, is not a good sign and it will definitely affect your audio.
Please note that the checker does not test the entire range, just the first and last few ports!

Please read this document hear to learn which ports you need to open on your firewall https://www.3cx.com/docs/ports/

Basically, ports 9000 until 10999 will have to be forwarded in full cone NAT mode. You will have to refer to your router/firewall manual to learn how to do this and then run the firewall checker again until everything has passed.