On Mon, Dec 29, 2014 at 5:03 PM, javier falbo <javier_falbo@hotmail.com> wrote:
Hi,

I would like some help from a kamailio expert.
I have installed on a Debian7  64 kbytes VPS this tutorial:
http://kb.asipto.com/kamailio:skype-like-service-in-less-than-one-hour,

Problem is that there is no voice in a zrtp connection, but i hear only the ring sound ok.
Strange is that on my local wifi works all perfect including the voice, but with external ip no.
Any help? I would like to hire a kamailio expert for fixing this and also adding some extras.
Write me directly so we could get in contact.

Kamailio itself doesn't handle media, only SIP. Your issue sounds disturbingly like a NAT problem, which is not uncommon.

Are you using the nathelper module? Are you using an RTP relay such as RTP Proxy or MediaProxy?

Is your Kamailio server behind a NAT?

Please provide SIP traces, logs and configs and we'll do our best to assist.

Corey