Low download speed

[#1]

Basically
When in your normal socket you had
Bandwidth (Up/Down) [kbps/kbps]: 448 / 1,312
Line Attenuation (Up/Down) [dB]: 21.0 / 37.0
SN Margin (Up/Down) [dB]: 22.0 / 24.0
But in the test socket you have
Bandwidth (Up/Down) [kbps/kbps]: 448 / 3,872
Line Attenuation (Up/Down) [dB]: 20.0 / 34.5
SN Margin (Up/Down) [dB]: 22.0 / 16.5
This tells us several things
Your internal wiring is really mucking up your speed
Because of the problems caused by your internal wiring the default noise margin has been increased to 15dB
The low sync of 1312kbps has pushed your IPprofile down to 1000kbps
If you want to use your normal socket you will need to sort out your internal wiring.
This is a good start http://www.kitz.co.uk/adsl/socket.htm
Once that is fixed the default noise margin can be reset to 6dB which will give speeds of around 5000kbps
Are you sure that everything is filtered including a Sky box if you have one

[#2]

Correct,
Your line speed at your normal socket was 25% of the speed at the test socket.  This tells us that there is a problem between your test socket and your normal connection point.  You do not see an immediate improvement in speed when returning to the test socket due to the IP profile.  The IP profile is a speed profile where downwards changes happen almost instantly but positive changes can take a few days to take effect. 
I would strongly recommmend you take a look at your internal wiring to see if any issues can be found that may cause a bad connection.

[#3]

OK, so assuming the router remains in the test socket, how long does it take for the speed to come right?
In the mean time i will check the wiring to the rest of the telephone points.  This is a new build house and i would have thought the wiring would be correct, but i will check.

[#4]

In most cases your IP profile will update within 72 hours.  The maximum time as per BT's documentation is 120 hours.

[#5]

So its been 3 days now and here are the results
FAQ

Test1 comprises of Best Effort Test:  -provides background information.
Download  Speed
2683 Kbps
 
0 Kbps 7150 Kbps
Max Achievable Speed
Download speedachieved during the test was - 2683 Kbps
For your connection, the acceptable range of speeds is 600-7150 Kbps.
Additional Information:
Your DSL Connection Rate :3680 Kbps(DOWN-STREAM), 448 Kbps(UP-STREAM)
IP Profile for your line is - 3000 Kbps

If you wish to discuss these results please contact your ISP.
If you are experiencing problems with specific applications, servers or websites please contact your ISP for assistance.
Your test has completed please close this window to exit the performance tester.
Please visit FAQ section if you are unable To understand the test results.
and
Link Information
   

Uptime: 2 days, 21:02:49

DSL Type: G.992.1 annex A

Channel mode: Interleave

Maximum Bandwidth (Up/Down) [kbps/kbps]: 920 / 3,936

Bandwidth (Up/Down) [kbps/kbps]: 448 / 3,680

Data Transferred (Sent/Received) [kB/MB]: 0.00 / 601.94

Output Power (Up/Down) [dBm]: 11.5 / 19.5

Line Attenuation (Up/Down) [dB]: 20.0 / 34.5

SN Margin (Up/Down) [dB]: 22.0 / 22.0

Vendor ID (Local/Remote): TMMB / ALCB

Loss of Framing (Local/Remote): 0 / 0

Loss of Signal (Local/Remote): 393,214 / 0

Loss of Power (Local/Remote): 0 / 0

Loss of Link (Remote): 0

Error Seconds (Local/Remote): 458,816 / 0

FEC Errors (Up/Down): 40 / 6,873,470

CRC Errors (Up/Down): 26 / 16,129

HEC Errors (Up/Down): 31 / 48,379
As i don't understand the figures, can someone explain.  The download speed has gone up but not by a lot, is this what i can expect or will it get better?

[#6]

Looking at your line stats we can see that the SNR is very high which is lowering your speed.  As the attenuation is fairly low and the line is stable I have submitted a request to reset your line.  This will cause your line to retrain over the course of the next 10 days with an aim to improve your speeds.

[#7]

So i have left evrything as it was for the last ten days and the results are as follows
FAQ

Test1 comprises of Best Effort Test:  -provides background information.
Download  Speed
2236 Kbps
 
0 Kbps 7150 Kbps
Max Achievable Speed
Download speedachieved during the test was - 2236 Kbps
For your connection, the acceptable range of speeds is 600-7150 Kbps.
Additional Information:
Your DSL Connection Rate :2944 Kbps(DOWN-STREAM), 448 Kbps(UP-STREAM)
IP Profile for your line is - 2500 Kbps

If you wish to discuss these results please contact your ISP.
If you are experiencing problems with specific applications, servers or websites please contact your ISP for assistance.
Your test has completed please close this window to exit the performance tester.
Please visit FAQ section if you are unable To understand the test results.

and
Uptime: 1 day, 6:56:31

DSL Type: G.992.1 annex A

Channel mode: Interleave

Maximum Bandwidth (Up/Down) [kbps/kbps]: 928 / 2,976

Bandwidth (Up/Down) [kbps/kbps]: 448 / 2,944

Data Transferred (Sent/Received) [kB/MB]: 0.00 / 308.76

Output Power (Up/Down) [dBm]: 11.5 / 18.5

Line Attenuation (Up/Down) [dB]: 20.0 / 34.5

SN Margin (Up/Down) [dB]: 22.0 / 23.5

Vendor ID (Local/Remote): TMMB / ALCB

Loss of Framing (Local/Remote): 0 / 0

Loss of Signal (Local/Remote): 1,376,238 / 0

Loss of Power (Local/Remote): 0 / 0

Loss of Link (Remote): 0

Error Seconds (Local/Remote): 1,376,403 / 0

FEC Errors (Up/Down): 5 / 364,142

CRC Errors (Up/Down): 7 / 1,239

HEC Errors (Up/Down): 0 / NA
As i have said before i don't understand the figures, but what i do know is that the speed has not improved by that much.  What happens now?

[#8]

Hi suke,
Since the router remains in the test socket it would be worth testing your line with an alternative modem/router.  Your line is errorring quite heavily which is causing your SNR to increase and your sync rate to decrease.  If you are already using a different router then you should raise a fault at http://faults.plus.net/ for investigation.  If you need us to send you a test router then let us know and we'll dispatch one for you.

[#9]

Alex
I am using the original router that was supplied by yourselves.  Can you send a test router and then lets see what happens!

[#10]

Done.
That should be with you within the next 72 working hours.

[#11]

OK
I have had the new router installed since last Friday and the results are as follows
Test1 comprises of Best Effort Test:  -provides background information.
Download  Speed
2641 Kbps
 
0 Kbps 7150 Kbps
Max Achievable Speed
Download speedachieved during the test was - 2641 Kbps
For your connection, the acceptable range of speeds is 600-7150 Kbps.
Additional Information:
Your DSL Connection Rate :3744 Kbps(DOWN-STREAM), 448 Kbps(UP-STREAM)
IP Profile for your line is - 3000 Kbps

If you wish to discuss these results please contact your ISP.
If you are experiencing problems with specific applications, servers or websites please contact your ISP for assistance.
Your test has completed please close this window to exit the performance tester.
Please visit FAQ section if you are unable To understand the test results.

and
Uptime: 0 days, 18:46:15

DSL Type: G.992.1 annex A

Channel mode: Interleave

Maximum Bandwidth (Up/Down) [kbps/kbps]: 924 / 3,872

Bandwidth (Up/Down) [kbps/kbps]: 448 / 3,744

Data Transferred (Sent/Received) [kB/MB]: 0.00 / 43.64

Output Power (Up/Down) [dBm]: 11.5 / 19.5

Line Attenuation (Up/Down) [dB]: 20.0 / 34.5

SN Margin (Up/Down) [dB]: 22.0 / 23.0

Vendor ID (Local/Remote): TMMB / ALCB

Loss of Framing (Local/Remote): 0 / 0

Loss of Signal (Local/Remote): 327,680 / 0

Loss of Power (Local/Remote): 0 / 0

Loss of Link (Remote): 0

Error Seconds (Local/Remote): 393,298 / 0

FEC Errors (Up/Down): 69 / 7,785,829

CRC Errors (Up/Down): 54 / 44,461

HEC Errors (Up/Down): 107 / 78,808
So, there is some improvement but its still not fantastic.  What happens now?

[#12]

Best thing to do would be to raise a fault as Alex posted above - http://faults.plus.net. We'll test things from there for you and advise further, and will raise it to our suppliers for more investigation depending on what the test results show.

[#13]

Thanks Matt, fault reported