Welcome to the Kitz forum.
I think it might be best if you describe how the telephone line reaches your home and the sockets/wiring therein.
Thanks for the welcome and the reply.
As far as cabling entering the property, I'm in a first floor upstairs flat where there is a junction box outside my window a couple of feet below it. From that box a cable rises from it and goes round to the outer wall and then into my property through the wall connecting to an NTE5c masterbox. Estimated 6-8 foot of what looks like black cat5e drop wire. Everythings looks OK there.
The cable on the other side of the junction box appears to run about 30 feet max along the building then the same wire type runs down into the soil of a flowerbed near the wall (nobody uses the flowerbed so I'm sure it's not damaged) where there's a nearby BT manhole cover. This runs in a straight line and there are a few smaller junction boxes along the way. The BT cabling does however run round the whole building but I look to have just 3 neighbors before me with little junction boxes inbetween.
Large square gray boxes with oval shaped covers just have cables running out the top and the bottom, like the one near my window, which seems to be used partly to get cables to the upper floor. The ones along the run between myself and the neighbors I would describe as a smaller star junction. No additional junctions between my NTE and the grey junction box outside my window.
My local cabinet is just over the main road by 35 feet max from my window on the left, but the external drop cabling runs 30 feet to the right as I said so it must go back on itself. Maybe 80 feet from the cabinet then? There are no overhead wires, all underground or on the side of the building as mentioned.
I don't have any extensions, various cables were tried, adsl filters swapped, currently just sitting in the test socket with a new ADSL dangle filter and cable that came with the technicolor router (also tested new cable/filter with other routers with no difference). Faceplates.. well, I have two openreach VDSL filtered faceplates since BT gave me a new one to replace the flat one, so aside from the flat one that's blown the faceplates appear to be fine.
The adsl and phone are BT wholesale.
1.3 Kilometers from the exchange according to one of the engineers.
down attention: 31.0
up attenuation: 16.3
Down SNR: 6 (9 doesn't help).
Up SNR: 5.4
I've probably forgotten to ask for other details but you can probably sense that any attempt at a remote diagnosis requires full knowledge of the existing infrastructure.
Yeah I get ya, I just didn't think to mention the cabling.
Last engineer did a pair quality test though and it didn't turn anything up. He was pretty thorough checking for adsl and phoneline faults too. So perhaps cabling is OK, even if obviously not perfect for me.
There is a slightly sinking BT manhole near the curb where a puddlesometimes forms. Engineer basically said it would drain off in guttering if it gets inside, and they'll often find joints are dry regardless of any problems with water getting in. Of course things are drying up now so I'm sure it wouldn't be as bad now and no more drops when it rains. Any thoughts on that?