@aesmith exactly. That is the figure I am used to seeing.
So not sure what was going on with the numbers from that speedtester.
And now it appears that that has gone away, and the huge jitter is a lot less. Currently speedtester2.aa.net.uk is giving:
Ping = 48.34
Jitter = 10.37
at Downstream = 10.21 / Upstream = 1.62
Perhaps it was a duff result before, because of alien traffic perhaps ?
The other difference that I can think of is that line speeds have improved and the lines’ downstream performance figures are all very close, upstream not so?
Could the ‘jitter’ figure be affected by that kind of disparity?
I would have thought that quirks of the two routers’ packet scheduling designs (the router at AA and my own Firebrick at my end) wouod affect the jitter figures for me. Does that make sense? I am thinking that if I were designing a router of this ilk I could aim for minimised jitter as opposed to maximising throughout or other priorities if that is what one wanted to do.
Does a poor jitter value mess up some voip systems?