Call hang up after max 5 minutes

[Acribia]

I have a strange behaviour
My 3CX (V20) is on a private cloud, with 3 sip trunks; my users work at 2 branch offices, and sometime at home.
I use most PWA or web client.

Everything was fine until I change the internet lines in one of the branches.
Calls from that branch office, using pc pwa or web client, ethernet connected, hang up after maximum 5 minutes; all the calls, regularly.
Using from the same branch office a mobile phone, wifi connected, calls do not hang up.
Meantime everything else works perfectly: teams, video, webinars.

Everything ok from the other branch offices and from home.

I have just few things to try:
- use wifi insted of ethernet
- use the Windows App

Are there any parameters that may influence this behaviour ?

 

[leejor]

Have you checked logs to see which end is dropping the call?
When you say you changed the Internet line, what does this mean? Router, provider, other hardware?

 

[Acribia]

I tried activating verbose log and check, but I noticed no meaningful messages.
I will post a log the next try