ADSL2+ at Riccall exchange now or not

Question

I spoke to BT broadband support about 3 weeks ago and could not get a sensible answer from the operator. He promised he would investigate but has not come back to me - so hope somebody can help out -
dslchecker.bt.com and the BT sales "what speed can I get" checker say ADSL2+ is available on Riccall exchange with a downstream rate up to 17 Mbps on my phone number (sounds right as my copper length is approx 500 metres from the exchange from another site check)
Yet I appear to be stuck on ADSL Max up to 8 Mbps rate looking at my hub figures and speedtest.btwholesale.com tests at 6.8 Mbps download constantly (as expected for ADSL Max). BTW test will not let me do a diagnostic test at all  (why?) so I cannot see my ip profile. Historically it showed approx 7000 ip profile which tallies with the tests I am getting now.
BT are now selling ADSL2+ as availlable on my number and exchange and I asked him was it that my ip profile was stuck or was it that the rolout had not occured ? He did not even understand what I was talking about - all he would say that no fault was showing. I told him time and again that this was not a fault query.
I told him that ADSL2+ was previously indicating a Feb 2014 availability at our exchange but the BT wholesale website was now showing it as available now - question 1 was that site wrong? was the WBC rollout spreadsheet at BTW website issued in December wrong? was the BT sales website wrong? - was it in fact still not activated? had my line been migrated (if necessary) to it? - he still was blank
Really simple questions -
1) is Riccall exchange active as ADSL2+ or not?
2) if not - when?
3) if yes - why not my line?
4) when for my line?
5) why has he not come back to me as promised?
I will tell my number to a BT person if they respond to this but at least someone my be able to answer the overall Riccall exchange question. Thanks in anticipation
Solved!
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Answer 1

Hi alyork,
Your exchange Riccall (MYRIC) is now showing a BTw 21cn ready and available.
As a BT Retail broadband customer and still in contract thenonce your exchange has been BTW 21cn upgraded then your will automatically be migrated to the new 21cn network. However be aware that this can take days to weeks to months after the exchange is BTw 21cn upgraded as the lines have to be manually migrated over in batches.
As to the BTw 21cn network which allows ADSL2/2+ modulation (upto 12/20mbps), the ADSL2/2+ modulations are more aggressive to any noise on your line. It may also increase your line attenuation by 2/4dB, therefore on longer lines it can make the connection unstable if your line isn't able to cope with these higher frequencies.
Also when your exchange has been 21cn upgraded, the lines have to be migrated to the new 21cn hardware in the exchange in batches so it can take days/weeks/months for all the lines to be migrated over to the 21cn network. Also you may be kept on ADSLMax (upto 8mbps) modulation but on the 21cn network if your line isn't able to cope with ADSL2/2+.
Some BT Retail customers have tried to recontract their BT Retail broadband and other services to try and skip the queue, however you may need to agree on a new contract period.
In my experience it took about 4 months for our line to be moved onto the BTw 21cn network after the exchnage had been BTw 21cn upgraded
I'm no expert, so please correct me if I'm wrong