In reply to a post by woodpeckerx:

TT line DLM seems to have rebanded overnight, now 73971/19999 SNR 13.9/15.7

BT modem has been left powered off.

Maybe interleaved is ON!

Interleaver Depth showing 1 on up and down

In reply to a post by woodpeckerx:

Interleaver Depth showing 1 on up and down

must be crosstalk then!

I will take some stats from before one of my two lines is deactivated and then check the remaining one after, see what impact it has, and will post here.

8.5 to 12 MHz is used for UPSTREAM and as you are measuring close to the upstream source that level does not surprise me.

is it possible engineer made a report then banding was applied to stop the customer stating speed changes with only one line?

this wouldnt surprise me, because a customer showing an engineer a line speed up when the other is disconnected would make the engineer uncomfortable knowing its proven.

I don't think the engineer got any banding applied, he got the banding removed from the BT line as that was showing 69M attainable with 57M sync. This line on its own will now sync 79987 with attainable 82.9M, the attainable is 5M down today, its wet, wonder if there is a water issue on this line.

He did admit to me he was noob at fibre but was very helpful and I spent I good few hours going through it with him.

I just don't know what they are going to expect me to accept now, he found a line fault, claims to have fixed it but doesn't know how....

We started out at syncs of 79M and 57M, I don't want to accept anything less.

In reply to a post by woodpeckerx:

the attainable is 5M down today, its wet, wonder if there is a water issue on this line.

It could be. Or perhaps another customer has ordered FTTC, and their line is adding to the crosstalk picture.

I guess you'll find out when things have dried out.

I just don't know what they are going to expect me to accept now

...

We started out at syncs of 79M and 57M, I don't want to accept anything less.

The problem is that 3rd parties will order FTTC, and some of those will cause some level of crosstalk. Unknown amounts, and random - it depends how coupled the wires are. BT know this, so never go chasing faults reporting small drops in speed. And by small, their threshold seems to be 20% (or is it 25%?)

The cabinet was quite empty at first, right? Was it recently installed? If so, I guess you can expect take-up to rise reasonably soon. In such a dynamic environment, you might *never* be able to get these speeds back, even if your line gets "fixed."

BTOR installed a second drop wire which helped quite a bit, my crosstalk problem is between my 2 connections rather than anyone elses line, both sync at 79997 on their own.

I guess my only hope for both at full rate is that vectoring is used in the future.

Currently the BT line shows 63M sync and attainable.

The TT line now shows 79984 attainable but only synced at 64052, hoping DLM will come back up on this line.

The TT line has now turned on interleaving, not sure why.

In reply to a post by WWWombat:

BT know this, so never go chasing faults reporting small drops in speed. And by small, their threshold seems to be 20% (or is it 25%?)

If my experience is anything to go by it they aren't interested if there's a 30% drop. Dropped from 72 Mbps to 50 Mbps in one go back in April and is now 47 Mbps and still falling.