Ethereal-users: [Ethereal-users] FW: rtp statistics--how is delay calculated?

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From: "John York" <YorkJ@xxxxxxxx>
Date: Wed, 15 Oct 2003 14:23:40 -0400
Sorry-I forgot to send this plain text and it looks like the list server deleted the message

I found a post on this in the archives, but no one answered.  So ...
 
The new RTP statistics tool (tools > statistics > rtp analysis) is great, and I especially like the ability to save the data in csv format.  I can then compute average delay, plot histograms of jitter, lost packet data, etc.
 
However, I'm trying to document the quality of our h.323 traffic across the WAN and I'm getting strange results.  The average delay for a connection between 2 units on the same switch is about 59 msec.  When I do the same measurement and computation for 2 units connected across the WAN, the average delay is still 59 msec.  This can't be correct.  Can anyone tell me how delay and jitter are calculated in Ethereal?
 
Thanks
John
 
 
John York
Network Engineer
Blue Ridge Community College
1 College Lane, Weyers Cave, VA 24486
540.453.2255