3CX App Call Quality Issues

[Rono]

Hi,
We're having issues with call quality especially on 3CX Android apps, the signal bars keep turning green, good quality, and red, poor quality, during the call,
thereby affecting audibility, and also 'scratchy' noises.
We're running 3CX version 16 on a Debian VM

 

[VasilisV_3CX]

Hi @Rono,

Does this happen on all calls or just some?

Are the mobiles having the same difficulty over LTE and WiFi?

What version of the Android app are you running?

Please include the following: https://www.3cx.com/community/threads/every-new-post-must-contain.20492/

 

[Rono]

Hi @VasilisV_3CX,

Thank you for your prompt response.

It happens on all mobile phones in our environment, both on Wi-Fi and LTE.
Also we have cases of Samsung A31 android 11 having to redial to be heard on both ends and still it isn't clear.
Calls outside the network, both parties, are however clear

3CX PBX Version: 16.0.1078 on a Debian 9 VM
Network Connection: Both Wi-Fi IPv4 and LTE
Both Same Network (MPLS) as PBX or either party outside the network

 

[VasilisV_3CX]

Hi @Rono,

What codec order do you have set in both the Management Console >> Settings >> General and the Management Console >> Extensions >> [the extension] >> Phone provisioning >> 3CX App?

Try and move GSM FR to the bottom, as well as G729. Have G711 U-Law and G711 A-Law at the top. Make sure they are the same in both the extension settings and the general settings of the PBX and try again. Does the quality get any better?

 

[Rono]

Hi @Rono,

What codec order do you have set in both the Management Console >> Settings >> General and the Management Console >> Extensions >> [the extension] >> Phone provisioning >> 3CX App?

Try and move GSM FR to the bottom, as well as G729. Have G711 U-Law and G711 A-Law at the top. Make sure they are the same in both the extension settings and the general settings of the PBX and try again. Does the quality get any better?

@VasilisV_3CX ,

Let me do this, test and get back to you

 

[Rono]

@VasilisV_3CX,

We're noting improvements, but kindly note that the signal levels ( bars) keep fluctuating during conversation, is this a coded issue?

 

[VasilisV_3CX]

Hi @Rono,

The signal quality wouldn't be based on codec orders. It would most probably be an unstable connection between the PBX and the App that would cause the bars fluctuating. Is the Android App on WiFi at the time?

 

[Rono]

@VasilisV_3CX,

We did test both on Wi-Fi and LTE, the calls appeared stable though, but the bars kept fluctuating throughout the conversations.

 

[VasilisV_3CX]

Hi @Rono,

We're noting improvements, but kindly note that the signal levels ( bars) keep fluctuating during conversation, is this a coded issue?

Can you confirm, does this mean that the issues with audio are resolved but you're still seeing the bars fluctuating or do you mean that the quality is still fluctuating with regards to the changes of the bars?