I am new here, but it's a nice friendly place, for a little study like this.
Background:
I live in a lane of 29 houses, 28 terraced on one side of the road, and 1 detachad on the other side. The lane runs North-South. The exchange is 2.2 kilometers to the south. There is a BT box at the south-end of the lane, and a cable then goes up to a telephone pole that directly services the 1 detacted house, and a series of poles (5 in number) that service the terraced houses.
I live at no3 of the terraced houses, which means I am on the 2nd pole and at the absolute shortest distance from that pole. (Like it's in my garden!)
(I maybe should explain that the houses in this terrace are numbered 1,2,3 to 28, not 1,3,5 etc.)
OK so far?
I moved in 4 years ago, at that time I used 192.com to download details of the entire lane - names, addresses, phone numbers.
Since we send each other Xmas cards, I have always kept some parts of the list up to date.
The point of the posting:
Earlier today on the Zen forum, there was some discussion of how the BT Wholesale projected speeds are derived. And Zen's Phil indicated that it was simply distance related. I think that there is more to it than that.
I put my lane's phone numbers into the checker at /www.prodigynet.co.uk/menu.php?page=support/adsllinecheck.
Of 29 houses I could get ADSLMax download speed projections for 19.
3 had projected speeds of 4000
9 had projected speeds of 5000
7 had projected speeds of 5500
The nearest house to the exchange (in wire term), the one house on the first pole (and who has ADSL - fsnet, not maxed) is projected at 4000, and numbers 27 and 28 (the furthest from the exchange in wire distance) are projected at 5500 and 5000 respectively.
There are only 4 houses that currently have an ADSL connection - mine (projected at 5000) and the three that are projected at 4000. I am the only one that has been maxed.
I've consistently synched at fast 8128 since conversion on 2 May, with SNR margins between 6.6 and 5.4.
Ray