we have a problem from a branch office, here it is the scenario:
- Connectivity 2 Mbit/sec dedicated to voip
- openvpn tunnel to freepbx, tried with and without cipher
- Freepbx with one cpu xeon x5670 and 2 GB RAM, but TOP says that is used a bit part of them
- Freepbx behind a vpn server (no-nat) with one hundred Mbit/sec of connectivity
When users try to make more then three calls the voice begins to be choppy.
The bandwidth usage never goes over 400 Kbit/sec
From freepbx shell if i monitor the phones the latency never goes up 50 ms.
From freepbx logs i see sometimes phone disconnected for excessive lag but mtr never shows average latency over 50 ms (even on thouands packets).
Someone can point me on which tool i’ve to use to better check the connectivity or point me somewhere to help me resolve this issue.