Could be either! I'm no expert and I'm out of my depth but my understanding is that the lower tones, the lower frequency signals should travel a long(er) way. So the lower half of the graph in blue should be tall and strong, the longer your line the quicker it will taper off at the end. So a 24mb graph will be a giat blue rectangle all the way out past where ours tails off.
So the fact you have holes in the graph early on in the those tones which should be strong must have something to do with the line.
I had an issue which BT wouldn't resolve, I lost half my sync overnight. The DMT graph for that had a massive dip in the middle of it, like a rollercoaster!
I left it 3 months and could get no fix from BT or ISP. I bought another line and during installation the engineer went to connect the new pair at my local cab. I'd been nice and kissed ass already asking for a good job/pair, he said that he was very very sorry but he'd found my old pair had a join which was floating in six inches of water, he had cut and rejoined it but would have to carry on with the new line (even tho he admited he'd probably fixed the old one)
It turned out that cut n splice he did actually fixed the old line and the graph of that you see above. So now I have a second line I don't need after he has fixed a problem on the first that nobody would admit existed or even look into... :/
You should have at least 4mb sync if not more but my isp kept saying even if you had 512k, we'd class that as ok.
Edited by Magsy (Thu 09-Dec-10 15:28:33)