Conference Call Codec priority - v18

[jrpipers]

Apologies if I've posted this in the wrong forum but wanted to ask if anyone can confirm how one can set a code priority list for Conference calls. I have v18 installed on a Raspberry Pi 4 and have set the Global Codec priority to G722, G729 and G711 (when on wifi/local network) and G729, G722 and G711 (when on 3g/4g). Whether I start an impromptu conference call from the Windows app or my Android app, the conference call quality is fair bit inferior as compared to a 1-on-1 call. On v16, I think I recall seeing an option in the Settings to upgrade to a better audio codec for Conference calling but that required a paid/pro license.

Is that still the case now? I'm currently using the free 3cx license and wouldn't mind paying if I can upgrade the call quality of conference calls, irrespective of where the conference is initiated from (e.g. from a Smartphone or Windows app).

Would appreciate any guidance! Thanks in advance.

 

[VasilisV_3CX]

Hi @jrpipers,

On v16, I think I recall seeing an option in the Settings to upgrade to a better audio codec for Conference calling but that required a paid/pro license.

I don't believe this was a option on our PBX.

Can you change the Codec priority on the apps to G711-U first? Then reprovision the extensions and give it another try?

 

[jrpipers]

Hi Vasilis, thanks for your response! I'll give that a try and will report back. And thanks for correcting, perhaps I must've misread the setting.

But can 3CX host a conference call with a G722 or G729 codec? Or can it only use G711-U for conference calls?

Apologies, if I'm getting some of the terminology wrong, new to 3cx and the world of PBX!

 

[ChrisC_3CX]

It can use other codecs as well depending on the offer provided, which you can partially control with the Codec priority list in "Settings >> Codecs". I recommend testing a few different codecs as the first codec to see if you notice an improvement with any.

Note: I recommend keeping the same order for both LAN and WAN lists. Also bear in mind that 3CX Apps need to reprovision for the changes to apply, re-launching them should do the trick if you have this setting enabled on the extension in question: