Just because you neighbour can get 70Mbps does NOT mean you can too.

The point is that your attenuation is at a level which would deliver high fifties or maybe just over sixty. Without knowing the actual cable length it is difficult to confirm if the attenuation is correct. There may be an access point outside your house and you "think" you know the cable comes straight to you, however it could go to a property further away, have their pair(s) taken out before coming back to you.

I think we need to forget about the cabling and look at the fact that BT Wholesale checker says he should get 80/20 and 80/20 on impacted line....

If it was self install it says lowest would be 61/12 but this isn't the case...

Where are those actual figures? They are not posted in this thread.

Is there a way to tell how long the line actually is? Would it be in the Engineer's installation report and would Plusnet have access to that?

When the Engineer rang me yesterday morning to ask if he could possibly do my installation 4hrs early (!!), he said that he'd already tested the line and found a fault that he was going to attempt to fix - could this be causing a problem which would drop the attenuation? Assuming he didn't fix it of course - which the noise on the line would suggest.

Yes they are

Finally some sense

Is it worth mentioning it to Plusnet or are they likely to give me the usual speech of having to wait until the 10 days is up? The line noise make me think they'll probably listen to me.

His test equipment has a Time Domain Reflectometer (TDR) function which sends pulses down the line and measures the time taken for a reflection to be returned. Similar to you shouting and waiting for an echo.

By measuring the time taken - on a 500 m line it will be around 3.6 microseconds, the line length can be measured to a good degree of accuracy. Any faults such a corroded joints or factors such as bridge taps will also be shown and the distance of those provided.

Faults will normally impact in one of two ways - very minor increases in attenuation or a very large increase. A single leg disconnected - however as voice works, that is not a problem. An extra termination on the line - possible but unlikely.

Why not put the original modem back and see if the fault you detected is still there or if it has been fixed.

The SNRM of 6.1 isn't low. It's standard.

Your actual and attainable are now right in line with what I said in your previous thread regarding the attenuation.

You mention noise on the line. That probably would affect speed, but I'm not sure what kind of fault would cause inflated attenuation. Did your engineer confirm the nearby cab is the one you're on? We sometimes see ex-showhouses on one further away, the nearby one being added when the estate is well into the build stages.

Noise on the line isn't subject to the 10-day myth. I suggest you give Plusnet a kick so we eliminate that first. Was the house previously on FTTC do you know? The OR VDSL2 filter would have given that away if present when you bought it, or more surely when you took over - before the line was activated.

Care to point to the OPs actual figures?

You said the noise went away when using the Billion. Has it come back?

If not, that suggests it was the modem (or PN router?) power supply possibly dodgy.