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When will 20CN be officially dead?

BRABUS
Grafter
Posts: 660
Registered: ‎12-01-2010

When will 20CN be officially dead?

I have been reading one of the PlusNet blogs about teh new 21CN and how the 20CN is not going to be around much loonger.  Does anyone know when 20CN will be officially dead as my exchange still has no info on when 21CN is coming.

I am just trying to gauge it so I can stop wasting time and checking the DSl checker and SamKnows in the silly hope that we will get it soon  Grin
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Re: When will 20CN be officially dead?

As far as I know BT have no plans to install the new equipment in a lot of the smaller exchanges as it isn't cost effective
BRABUS
Grafter
Posts: 660
Registered: ‎12-01-2010

Re: When will 20CN be officially dead?

what do you call a smaller exchange and does this mean we will be left on 20CN ?
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Re: When will 20CN be officially dead?

http://www.trefor.net/2011/07/27/latest-bt-adsl2-rollout-plans/ indicates that about 55% of Market 1 exchanges weren't in the 90% rollout plans
BRABUS
Grafter
Posts: 660
Registered: ‎12-01-2010

Re: When will 20CN be officially dead?

Well it looks like 21CN won't be out to everyone until 2020 http://www.trefor.net/2009/11/27/project-pathfinder-21cn-voice-by-2020/
Sad  Cry
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Re: When will 20CN be officially dead?

A bit out of date
Quote
Project Pathfinder – 21CN voice by 2020
by tref on Friday, 27 November, 2009

BRABUS
Grafter
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Registered: ‎12-01-2010

Re: When will 20CN be officially dead?

Sorry Jim my mistake.  Do you know what the plan is so that I can get off my 20CN for slowish broadband as a worst case scenario? 
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Re: When will 20CN be officially dead?

No idea
x47c
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Re: When will 20CN be officially dead?

Well here is my scenario.
Smaller exchanges are simply not worth upgrading to 21CN in terms of economic viability
Some have only a few hundred subscribers - that is less than are fed some single cabinets in a large urban exchange!
So what to do....
Well it is quite possible to supply broadband fibre to a fibre box from a quite different exchange from the one the voice phone lines are fed from.
So you could have a street cabinet where the incoming voice E-side multi core cable is from the local exchange as before while the fibre box alongside is fed from a quite different exchange - albeit probably though the same ducts as the E side voice cables.
That way the exchange area would not have 21CN/ADSL2+ but would go direct from ADSLmax to FTTC.
Under this scenario many smaller exchange would not be enabled for 21CN ever.  But then many smaller rural exchanges have a more diverse/spread out population density. As we know ADSL2+ only benefits the closer properties to an exchange so for an exchange of say 300 subscribers you might end up with only 50 being able to benefit from ADSl2+ - you can see why its not viable.
This might be a cost effective way out of the problem.
So we then move to a position where we have 'master exchanges'  fully 21CN'd which feed the broadband supply to a selection of surrounding local 'sub-exchanges' as they would then be called.
This is possible as broadband fibre supply does not detriorate in speed with distance so the cabinet can be any distance from the enabling exchange. (well technically I think fibre needs repeater stations every 100Km or so).
Maybe much longer term (think decades) we would see the closure of the smaller exchanges as the copper loop is discarded, and everything comes by fibre FTTP from a master mega exchange serving the entire local region feeding some 1000 local street cabinet/fibre boxes direct.
There is my ideas
Any comments welcome



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Re: When will 20CN be officially dead?

In my case fibre has leapfrogged ADSL2+ and is available to me now. ADSL2+ is pencilled in for later this year.
BT were using a pen loaded with disappearing ink so a pencil is a step up but as has been said many exchanges don't have any dates for either ADSL2+ or fibre Sad

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Re: When will 20CN be officially dead?

I really hope that my exchange of ~1500 res, 150 bus doesn't become a sub-exchange of the already over-subscribed Aberystwyth one.
I'd be better off going back to dial up!
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Re: When will 20CN be officially dead?

Quote from: avatastic
I really hope that my exchange of ~1500 res, 150 bus doesn't become a sub-exchange.............
Huh