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Originally Posted by Kitty
:lol: on a map yes but over country unless you have suspended cables over a country park, river and valley its a long way off..
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I think what BBK is saying is that it's perfectly possible that there will be longer distances of fibre involved than the as the crow flies distance, this is for redundancies sake - there's no point in having two fibres run if they are both in the same ducting, it leaves a single point where fibre break takes service down.
As far as placement of Ashton and its' layer 1 routing, unless you know where the other set of cams are you can't say that that's close to your uBR than Oldham. From what BBK says this was done for load balancing purposes and seems to do that quite adequately - I really don't see what the issue is with going via Oldham, if you knew the sort of elongated routes DSL subscribers can take through BT's ATM cloud you may see things a bit differently!
What you see in your street is not the same as the fibre that connects uBRs to the rest of the network though, they are seperate networks.
However as I've already mentioned light travels at just under 300,000 km/second - London to Bristol in 1ms or so - it takes about 60ms to cross the Atlantic, going through the numerous repeaters on the way, I can't really see the extra length there making anything more than microseconds of difference and it certainly wouldn't affect services in any way shape or form.
11 26 ms 25 ms 25 ms mant-t2core-b-pos31.inet.ntl.com
12 27 ms 25 ms 27 ms oldh-t2cam1-b-ge-wan54.inet.ntl.com
13 26 ms 25 ms 27 ms ubr01asht.inet.ntl.com