You are correct.

I was not aware the type of router used will significantly affect the BQM graphs.

The O2 TG582n produces a much cleaner graph compared to TG585 v7 at idle.

TG585 v7 - firmware 8.2.7.7 - 25/05/13
http://www.thinkbroadband.com/ping/share/851136b3a58...

TG582n - firmware 8.4.4.J - 26/05/13
http://www.thinkbroadband.com/ping/share/cc9d45f493f...

Both routers work fine otherwise.

In reply to a post by Oliver341:

In reply to a post by Chrysalis:

no it isnt.

eg.

10
10
10
80
10
10
10
10
10

is not 70ms jitter.

Ok. What would be the jitter in your example?

I think they would yield 21-22ms jitter.

17.5 actually.

I'd just like to add to this: my Samknows monitor shows little (if any) corresponding increase in 'RTP Jitter' during peak evening times. Yesterday's graph, for example, shows a variation from 0.4 to 0.7ms between 4PM and 11PM where the TBBQM shows a blue peak of around 3ms betwen 9:30PM and 10:00PM, conversely the Samknows graph shows a single peak of 2.45ms at 2PM with no visible blue on the QM around this time.