[SR-Users] Voice is breaking when using Kamailio 4.1.3

varun pratapsingh varunps2003 at gmail.com
Fri May 2 13:39:03 CEST 2014

Hi Daniel,

Yes I agree with you that kamailio is not involved in the rtp handling and
forwarding but RTP Proxy does this. So I have mentioned that when my call
is established then my RTP passes through the RTPProxy. The issue is that
RTP is coming proper at UAC Side so no Voice Problem but may be RTP is not
coming good at Phone Side that is why voice is bad at Phone SIde.

Please see again my network.

SIP UAC--------->Kamailio+RTPProxy------>SIP Server------->Phone

And Kamailio and RTPProxy are on same machine and load is not high only one
call is enough to produce this issue. It seems that this issue is with
RTPProxy. Please anyone can provide me some settings or inputs on this
issue. I can provide more information if required.

Thanks and Regards

Date: Fri, 02 May 2014 11:27:09 +0200
From: Daniel-Constantin Mierla <miconda at gmail.com>
To: "Kamailio (SER) - Users Mailing List"
<sr-users at lists.sip-router.org>
Subject: Re: [SR-Users] Voice is breaking when using Kamailio 4.1.3
Message-ID: <536364ED.4080806 at gmail.com>
Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"


kamailio is not involved in the rtp handling/forwarding. So either is a
bad connection somewhere in the path or an issue in the client sides.
Can you try with different phones?


On 02/05/14 07:49, varun pratapsingh wrote:
> HI All/ Daniel,
> We are using the Kamailio+ RTPProxy as a SIP and RTP Proxy to call the
> Phones. Our setup is like below:
> SIP UAC--------->Kamailio+RTPProxy------>SIP Server------->Phone
> Now when we call from UAC to Phone then voice is coming good at the
> UAC side. But we receive the bad voice at the Phone side the Voice is
> breaking and hardly audible.
> Can anybody faced this problem. Please suggest me any solution if any.
> I can mail any settings if anybody asks.
> Thanks in advance.
> Regards
> Varun
> _______________________________________________
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> sr-users at lists.sip-router.org
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users

Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
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