[RTPproxy Users] UDP Port Unreachable

[Ronald Voermans]

Hello RTPProxy users,

I'm still experiencing some quality issues with Openser and RTPProxy. Calls sound very choppy sometimes (not always, around 10% of the calls). So, it seems packets are lost, or jitter is pretty high sometimes. I've been running a monitor between our RTPProxy and our ITSP for some weeks now, and I find the following pretty interesting:

I'm seeing a lot of 'ICMP Destination Unreachable (Port Unreachable)', being generated by the OpenSer/RTPProxy. This means, I think, a RTP packet is received by the RTPProxy server but it doesn't 'listen' to the port. This results in a lost packets and thus choppy sound.

The server is dimensioned enough i guess (xeon processor, 4GB memory for around 30 calls concurrent).

What could be the cause of this Port Unreachable message?

Thanks in advance,

Regards,

Ronald