[Freeswitch-users] RTP media Issue

[Mr Nathan Downes]

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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