I found only 120-Mb~130Mb on all speed test sites a few weeks ago but gave it some time to be resolved in case there was a problem with the street cabinet, or headend etc.
Prior to this I was consistently getting something like 362Mb download and good upload.
I have tried testing at all hours of the night, and get the same results which leads me to think it's not an over-subscription problem. I would have noticed the speed changing gradually, not suddenly dropping to a third.
I have a decent Cicso-RV320 router, I have tried resetting things, using modem only mode. All connections are network cable, no WiFi in use, tested with multiple PCs on different ports, only using one PC at a time.
Power levels all between -1dBmV and 1.5dBmV, all channels locked.
I get the feeling that this is a problem at VM's end because the speed tests (various servers and sites) are suspiciously the same, every attempt, and time of the day. I don't want to be pay for a third of the service!
As I mentioned above: I have conducted speed tests at random times, like 4am etc. and there is no difference to any other time, or day. I know of the software you mention DJ_Shadow1966, but there is no way I was just hitting the congested times when I'm testing, look at my post times.
I'm working from home at the moment, the speed doesn't bother me at 120Mb, it's well below the guaranteed rate though. Which I need to bring up with Virgin Media.
I can't find the "Message" box link, which they advertise, and would be the easiest form of communication for me, like text. Although I'll get "We'll send an engineer round...". I don't want that and soon I won't want this service as I believe it is capped to a much lower guaranteed speed than I am paying for.
Indian call centre, when I called that were asking me to do the same tests I have already run. Or go into modem only mode (which I use anyway) etc. I've done these things.
I said no, I can't walk on an ankle at the moment (true).
This is a farce and needs to be reported to the ombudsman, which I will do when I find the correct details.
The connection speed I have, changed abruptly, and is a third of advertised, and these is a "guaranteed" VM speed (millions of clauses), which I don't get either. This would be a case, in my belief, as it is demonstrably this low speed constantly.
Thanks carl_pearce, but I won't bore people with them as I can interpret them myself. Upstream and Downstream are normal, the logs aren't too interesting as I reset the modem recently. Like I mentioned, nothing has changed at my end.
The reason I'm reaching out for help is that I believe that the problem isn't at my end.
Some of my experience:
Computers (first proper one being PII 400, was into Amigas before) and networks since 1997, always been a sideline as I've worked in electronics since the same date.
Working as electronics R&D engineer since 2007 at a household name company, developed network peripherals.
The reason I'm concerned about this is that the change was abrupt. 360Mb to 130Mb just like that? No. Networks don't do that.