BTW, is this a wireless connection?
Are you using a router? If so, which?
Aside from the lag (which doesn't appear to be Distributel related), the "test" that failed appears to be a test of either the upstream or downstream (by definition).QoS (Quality of Service)
QoS is a big topic in itself, but in our context of bandwidth speed tests, QoS represents the ratio of the worst reading to the best one. It is in fact a measure of the level of consistency in download speed. In speed tests, it is represented as a percentage. The higher it is, the better to quality. For good VoIP, the QoS should be 80% or more.
Or to visualize the failure of the test, see this page: »www.phonepower.com/wiki/How_to_u ··· for_VOIP
Seems to me that the part that fails might indeed be due to Distributel (congestion and/or throttling). Or it could be because you are on wireless, or it could be because the router you are using doesn't prioritize voip traffic.
This is best guesses. I'm not a voip user. Someone will likely chime in here.
If you are wireless or using a router, for the heck of it repeat the same test but only when you are directly plugged into the modem (no wireless & no router).