minus the bios stuff. thats standard windows stuff, its not a new version

So just to update further.

Had to phone complaints team as Tech2 team hadn't phoned me back to update or advise further. Complaints team phoned them while I was on hold and they advised that they wanted to reset the DLM. Told them that the openreach engineer had said he could do that but it would potentially create instability on the line and would reduce speed further anyway.

They were adamant they wanted to do it, so agreed.

Shortly after, sync speed dropped to 52.7 from 53.1.

That change in sync is insignificant and could be lower simply because of the time of day the like synced

It's possible the DLM reset had made no changes at all.
If you are on an ECI cabinet with Low Interleaving then a DLM would not change this.

Could you post any stats the modem gives?

Not sure if these are of any use?


Line status Show Time
Link type Interleaved path
Bit rate
Downstream Upstream
Actual data rate 52698 (Kbps.) 18413 (Kbps.)
Operating data
Downstream Upstream
SNR Margin 6.4 dB 6.2 dB
Loop Attenuation 15.3 dB 18.5 dB
Error counter
Indicator name Downstream Upstream
FEC Corrections 3488 618
CRC Error 567 0
Statistics
Transmitted Frames Received Frames
Frame Counter 32318062 44769431

An impacted line will perform worse than a clean one, it is simple as that; so the ranges will be lower. It makes sense but don't try to read any more into it than what it is.

I think you have hit the nail on the head.

Its known now by regulars on broadband forum sites that vodafone has backhaul issues.

Its kind of ironic that the same isp is been not very receptive of slow speed reports.

Well... Vodafone have agreed to let me leave my contract FOC. Agreed with the congestion present on the line and also said there was something weird going on with their routing.

Also couldn't explain why the speed had fallen below the minimum but agreed there were no further steps to take and I could leave whenever.

So, ordered myself a Three sim to try.

He then gave me this analogy about buying a car that could do 70mph, but when I went on a busy motorway I could only do 20mph... If I took it back to the garage, what would they say?

But you're not buying the car, you're paying a toll to use the road.

You're renting the slip road from Openreach, but the motorway from Vodafone.

Fortunately, the slip road connects to several different motorways, so you can choose a different one.

Actually you are paying for a contract with Vodafone that includes the slip road and the motorway - they just happen to be getting the slip road from someone else. You then try and take your car down the roads they have provided that they gave a speed expectation on but because they could only be bothered to install 1 lane on the motorway it is heavily congested and you can only do 20Mph - whereas a different supplier has a 4 lane motorway that runs just fine and you can do 70Mph.