Occasional one-way audio

[Faulhaber GmbH]

Hi there,

our 3CX is almost up and running. But now that we have bought the license the first issues start to appear.

The following is just examples of what happens:

A (webclient) calls B (webclient)
-> they don't hear each other

A (webclient) calls B (webclient) again
-> A can hear B, B does not hear anything

A (webclient) calls B (webclient) again
-> all fine

A (webclient) calls B (softphone)
-> all fine

A (webclient) calls B (softphone) again
-> they don't hear each other

A (webclient) calls B (softphone) again
-> A can hear B, B does not hear anything

It seems extremely random if both can hear each other or not... you call someone, you can't hear each other, you call again and it suddenly works... or still does not work...
3CX is version 16 and the 3CX firewall check says it's all fine. All of this happens in our LAN (no SBC, no STUN or anything involved). Firewalls on the 3CX as well as the firewalls on A and B are disabled.

How could I track down such a behavior?

Thanks a lot for any advise!

 

[AWS2P]

Hi,
What do you use in your LAN ? manageable switchs with VLAN?
Are device all wired connected ? or wifi ?
Pbx is running on dedicated computer , latest V16 SP2 ? Debian or windows ?

can you do a test echo service, dial *777 , speak and if it's ok you should hear yourself

On webclient what do you use Headset? webclient is running on Chrome?

 

[Faulhaber GmbH]

Hi and big thanks to you,

that echo service was a good hint: one of the two computers does not hear itself when I do this echo test. Repeated this a few times and it never worked although it worked sometimes when A and B called themselves.

Now the more detailed informations: we have an unmanaged LAN without any VLAN. Everything is wired, so there is no WiFi involved. 3CX has all updates installed (version 16.0.2.910) and is running on a Windows Server 2016 as Hyper-V guest. All drivers are up-to-date and VMQ is disabled (checked that earlier).
Clients are using Chrome: one has a Jabra Engage 65 and the other one has an analog microphone plugged in for testing.

Again, THANK YOU A LOT

 

[Faulhaber GmbH]

Checked again, echo test works in all cases: the audio is just not played on the Jabra headset but on the regular sound card... i can't see a way to change this in the web client

 

[AWS2P]

your headset is connected to usb port on computer?