BT Infinity and 21CN related?

Question

Hi all,
Our local exchange was updated to 21CN earlier this year, and I was originally told (by BT) that after a possible hour of down-time, my connection speed should go to the maximum supported speed. I had to call BT to find this information out, there wasn't any communication to say the exhange was being updated or there'd be a change in connection speed.
A couple of days ago, we had some marketing through the post about BT Infinity and the super-fast broadband speeds of upto 40mb.
I called BT to ask if we could be upgraded to Infinity, but was told it's not available till March 2012.
I was wondering, if the exchange was updated back in March/April this year, why cant I make use of the 21CN until next year? If I go onto BT's site to sign up as a new customer, it shows 12mb - 20mb as a possible connection speed (currently connecting at just over 8mb, and always have done since broadband was available). Other ISP's show the same possible connection speed.
I did think it could be the router, but I'm still using the HomeHub (v2) and the exchange is about 5min walk from the house.

Answer 1

Try entering your telephone number (for most accurate result) into https://www.btwholesale.com/includes/adsl/main.html
To confirm the estimate the line could achieve.
If your on ADSL go into your router stats and look for the connection type 
I was on the basic ADSL upto 8Mb (G.992.1) I contacted BT See THIS THREAD.
They put me onG.992.3 (ADSL2) with the hope the exchange would after a period of "training" then automatically move me toG.992.5 (ADSL2+).
However in my case due the long line length the change to ADSL2 did not increase my speed.... and therefore the exchange did not automatically move me up any further.
If the Checker shows you could achieve the 20Mb speeds then you could try as I did and ask the forum mods if they can get you changed up.
Infinity (Fibre service) is not related to 21CN.
SamKnows for example or BT Openreach may show your exchange now has infinity but the important thing is your Primary Connect Point (small local green cabinet) has to have a larger cabinet installed next to/nearby and yours looks  to be scheduled to be Ready For Service in a few months time.
Keep using the checkers.... Mine was showing 30th Sept then on the 1st July Infinity became available.... but be aware it can go the other way... especially if the bloomin' snow arrives.
Picture of a small green cabinet (far right) with a typical Fibre Cabinet nearby with it's cooling vents
When the new Fibre cab is powered up you can easily hear the fans running, indicating that it may be Ready For Service or soon to be.
Please Click On any Text in Blue as that automatically links to information.
PC (NDEGR)