[SIPForum-discussion] media delay calculation

Young, Robert (ryoung16) ryoung at caprock.com
Mon Jun 13 21:21:37 UTC 2011

I get an error when I try and run the client against the server.  This happens on Windows 7 or on XP

error occured in the server thread; nested exception is:
java.lang.NoClassDefFoundError: qos/protocols/Mensaje

Do you know what might be causing this or know of a fix ?


From: discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org] On Behalf Of Juan M. López Soler
Sent: Monday, June 13, 2011 10:41 AM
To: 'Umang'; 'shweta jha'
Cc: 'Antonio Sánchez'; discussion at sipforum.org
Subject: Re: [SIPForum-discussion] media delay calculation

Hi all,

You might use our VoIPTester tool  http://code.google.com/p/voiptester/

Best regards,

Juan M. Lopez-Soler
Signal Theory, Telematics and Communications Dept.
University of Granada
C/ Periodista Daniel Saucedo Aranda s/n

De: discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org] En nombre de Umang
Enviado el: sábado, 11 de junio de 2011 19:04
Para: shweta jha
CC: discussion at sipforum.org
Asunto: Re: [SIPForum-discussion] media delay calculation

If there is no qos in your network..you can just use ping RTT/2.

If there is qos (or if you don't know); do a tcpdump on the sender & another (at the same time) on the receiver; then match up the rtp between the two tcpdumps (using sequence numbers).  When you have correctly matched them, compare the time of the transmission from A vs the time of receipt @ B.  This is a little tedious, but you can create a script...I use matlab wireshark extension.

On Fri, Jun 10, 2011 at 2:29 PM, shweta jha <shwetajha77 at yahoo.com<mailto:shwetajha77 at yahoo.com>> wrote:
Hi all,

I am in need to calculate average travel time rtp media takes from android mobile handset A to android mobile handset B. I am only interested in network travel times which means time interval between media sent out from transport layer of handset A and media received by transport layer of handset B ( after receiving rtp packet jitter delay will get added to that ).

Or how to calculate media delay when Media Gateway sends out media and handset receives media , network travel time between these two entities.

I do not want to use RTCP RR report as RTCP RR transmission is optional.Handset might not always receive RTCP RR report.


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