IP Profile stuck for three weeks

Question

For the last few years we had fantastic speeds of ~7mbps and apart from a blip at the end of last year where a broken
Home Hub 2.0 caused our IP Profile to drop to 0.2mbps we've had no problems until now. We live only 500m (as the crow flies) from the phone exchange and the cable length can't be more than 1km.
Around three weeks ago I noticed our speeds had dropped to around 2mbps, confirmed with speedtest.net. I tried out the bt speedtester and noticed our profile had dropped to 2mbps. I assumed there just a problem with the exchange or something along those lines and decided to leave it a while hoping it would increase. Its been nearly three weeks since then and nothing has changed. I've tried restarting the router twice, although I was reluctant incase it caused the profile to drop further and this has changed nothing, even imediately after restart. 
I thought I'd check with the forums first rather than calling support as I've never found their help very, well, helpfull. 
Below is a recent speedtest and the current connection status on the Home Hub 3.
Download speed achieved during the test was - 1.6 Mbps
For your connection, the acceptable range of speeds is 0.4 Mbps-2 Mbps.
Additional Information:
Your DSL Connection Rate :8.13 Mbps(DOWN-STREAM), 0.45 Mbps(UP-STREAM) IP Profile for your line is - 2mbps
Connection Information
Line state: Connected
Connection time: 4 days, 22:23:54
Downstream: 7.938 Mbps
Upstream: 448 Kbps
ADSL Settings
VPI/VCI: 0/38
Type: PPPoA
Modulation: G.992.1 Annex A
Latency type: Fast
Noise margin (Down/Up): 12.9 dB / 22.0 dB
Line attenuation (Down/Up): 21.4 dB / 10.5 dB
Output power (Down/Up): 19.9 dBm / 11.8 dBm
FEC Events (Down/Up): 0 / 0
CRC Events (Down/Up): 23 / 6
Loss of Framing (Local/Remote): 0 / 0
Loss of Signal (Local/Remote): 0 / 0
Loss of Power (Local/Remote): 0 / 0
HEC Events (Down/Up): 22 / 0
Error Seconds (Local/Remote): 22 / 6
 Any help would be greatly appreciated and if you need any extra information that I've missed please just ask.
Thanks,
Jack

Answer 1

David81 wrote:
I notice your noise margin is high, it's usually around 6.1db. If it's any help, have look at my recent thread. In the end it came down to problems with my local cabling which, once replaced, solved the problem.
BT are able to reset the line if the profile is stuck at a low level but try the 17070 number option 2 for a Quiet Line test and see what happens and point out to BT if it's noisy.
I have to put on record that it seems to me tha BT are very reluctant to send an engineer, only as a last resort. In my own recent trouble, which lasted the better part of 2 weeks, I was given a variety of "explanations" for the trouble, including telling me my router was incompatible, that there wasn't enough "bandwidth" set within my router (which was nonsense), resetting the line which temporaily improved things but didn't last, and only after many calls and complaints did they finally cave in and send an engineer. They kept insisting that the problem seemed to be all within my property, which it wasn't.
They could have sent an engineer days ago and spared me an awful lot of wasted time and phone calls.
as the OP is on the max speed for adslmax the high noise margin is good and cannot be reduced to increase speed.  this gives noise margin in hand which will help give good connection when line upgraded to 21CN
high noise margin is not always the sign of a problem
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