21cn anyone?
VodkaOriginally Posted by Ephesians
My understanding is that it moves the network away from the current POTS to an IP based one.
If that's correct, its a lot more than just moving ADSL kit to the kerbside.
While ADSL2 has a limit of 24Mbps, with the equipment being much closer to the end user it will allow roll-out of other, much faster services. The technology that actually delivers the service to the end user doesn't necessarily have to be ADSL, there are other faster services (VDSL/2?) that will deliver over the twisted pair reducing the need of expensive fibre![]()
My understanding of 21CN is that we will still have copper from the kerbside to the home, and that's the limiting factor.
Cheers,
Stephen
I sincerely hope this is true and Mr Terrence Tibbs above is correct.
I'm a 512 kbps maximum user from the sticks so anything that hints at an oasis in the arid desert of BritishTelecomia is most welcome.
Oh yeah, I wasn't disagreeing with that
Just pointing out that it doesn't have to be limited to the rate of ADSL2 with an IP based network so close to the end user. ADSL/2 is old hat in the scheme of things really
Copper is still a *very* good medium for data (certainly in price: performance ratio). The issue BT has is the aluminium and poor quality cables that are still around; Those will be far more limiting than copper in the 21CN.
Like I said, having something digital so close to end users, even with copper as the last leg, opens up the possibility of technology's like VDSL2 being used![]()
The problem I have with 21CN is that it will probably turn out to be the end product, not the starting one. Hopefully I'm wrong and eventually we will have fibre to the home and not just the kerbside. I also suspect BT will be slow to adopt any other products which will give us a bit more than we currently have. I suspect that the minimum will be done to keep the UK in the top 25% worldwide and no more.
Anybody here from Swansea? I believe that's where they trialled it?
Cheers,
Stephen
Yeah, hope you're wrong too, but it wouldn't surprise me with BT. From what ive read though, 21CN should be a lot easier to upgrade when needed, being IP based.
Fibre is nice, but while I don't know how it stands currently, it used to be very expensive to terminate. Would also imagine that copper cables are a fair bit cheaper too (not to mention they are already there).
Oh and another point about 21CN that your diagram points out. With an IP based network so close, wireless is a real possibility for people![]()
and also -Wick, in South Wales, saw the first live customers moved onto BT's 21CN in November last year, and BT are looking to complete the migration of 350,000 customers in the Cardiff area this year.
so in theory it could be rolled out now without 21cn in place and anyone close to the exchange (as in meVDSL2 is an ideal solution for a cabinet placed deployment as it can manage speeds of 50Mbps on lines that are 1km long between the home and green street cabinet, for those with a distance of 0.5km to the cabinet it may even manage 100Mbps. Alas the money situation puts BT and other providers in a quandary since they need things like video over broadband to be a money spinner, but if applications like BBC iPlayer and BT Vision are too popular in the short term they could bring existing networks to a halt at peak times.) would benefit.
both from thinkbroadband
Last edited by MadduckUK; 19-09-2007 at 02:32 PM.
VodkaOriginally Posted by Ephesians
Ideally they'd get fibre to a nearby telephone box with lots of bandwidth, and stick line cards and terminate from there. Keep the max line distance relatively short, and hopefully some of the bad copper is on the way from the exchange will be eliminated. Keep it under 1km and 20mbit+ is easily obtainable. That'll put off the need for fibre for a little while.
Not to widdle on your chips or anything, but I think the average taxpayer might be a little less enthusiastic about chipping in their share of £10 billion just so netheads can get their pr0n and US TV shows on-demand rather than having to torrent it overnight. They might prefer to spend the money on e.g. a fast rail link from London Oop Narf. For nerds like us it's a no-brainer, but we are in the minority.
wow, didn't take them long to realise we're "lagging behind"....jesus
And yea bonedome, it does sit on the border of really being useful/wanted by people that use the internet a lot, in terms of taxpayers money.
¯\_(ツ)_/¯
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