[Freeswitch-users] RTP media Issue

Robert-IPhone rhuddleston at gmail.com
Sat May 12 04:09:16 MSD 2012

Start with running an extended "mtr" between the locations.

Maybe you are dealing with a latency issue.

I've also seen issues with duplexing.

So look at low level network issues

Sent from my iPhone 4S

On May 11, 2012, at 5:58 PM, Mr Nathan Downes <nathandownes at hotmail.com> wrote:

> Hi
> First time trying this mailing list,  I have my FS server in a data centre, which feeds site a, site b etc. over a fibre network.  We are having really bad call quality issues at one of the sites.  The residents report that every second or 2 there is a hiccup in the incoming voice and they miss a portion of the voice.  It is consistent and affects everybody.  I did some wireshark tracing of both sides of the calls (ext – fs and fs – provider) and to me it appears packets coming from my server have a wrong timestamp every second or so.  The server is not over loaded and is pretty default Ubuntu 10.04 LTS, latest FS Head on there.  I spent a week trying to diagnose with both the fibre provider and trunk provider but we couldn’t figure out the cause.  I then tried putting rtp-rewrite-timestamps in both the profiles (external one to provider, and internal one specifically for fibre company) and the problem appears to have gone away.  I would like to figure out what is/was causing the issue and also find out if that option puts any extra overhead on the server. If there is almost no overhead I would probably leave it on and just assume I need I for this specific connection.  I don’t have the issue at another site over same fibre network and trunk provider, and people connecting direct over internet don’t suffer same problem.  I have about 2gb of wireshark traces I can put online if required.
> Thanks, Nathan
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