Somewhat co-incidentally, I just read an interesting essay on the whole net neutrality debate, which gives a good explanation of the causes of jitter and network delays in general. You can find it here:
http://itpolicy.princeton.edu/pub/neutrality.pdf
Gilles
On Aug 25, Sean Walberg wrote:
On 8/25/06, *Bill Reid* billreid@shaw.ca wrote:
Of course pinging every sec does not simulate a RTP stream.This reminds me that I set up smokeping to watch for this type of stuff:
Here's a ping to my default route:
http://ertw.com/cgi-bin/smokeping.cgi?target=Gateway
And from home to work (probably going to go via Group Tel/Bell West)
http://ertw.com/cgi-bin/smokeping.cgi?target=Winnipeg http://ertw.com/cgi-bin/smokeping.cgi?target=Winnipeg
A fair amount of jitter (represented by the "smoke"), and there is a noticable difference in jitter in August (400 day graph of the Gateway graph), even after the data has been averaged.
Sean