Slower Broadband speed then usual... please help

[#1]

Hi,
My broadband speed have been quite stabled on approx 1.6mb, however I did a speed today, and it showed my broadband speed as 1mb.
The reason why my broadband speed have lowered could be because everyday my broadband connection will disconnects quite a few times and that might have lowered the sync rate on my router. When I had 1.6mb, the sync rate was 2,800something however, maybe because of the disconnections, that might have lowered the sync rate which have gave me a slower speed.
Below is my router stats if you need it

DSL Connection
Link Information

Uptime: 0 days, 11:56:55
DSL Type: G.992.1 annex A
Bandwidth (Up/Down) [kbps/kbps]: 448 / 1,696                                          <-- <-- <--  The 1,696 part used to be approx. 2,800
Data Transferred (Sent/Received) [kB/kB]: 0.00 / 0.00
Output Power (Up/Down) [dBm]: 12.5 / 16.0
Line Attenuation (Up/Down) [dB]: 31.5 / 63.0
SN Margin (Up/Down) [dB]: 11.0 / 16.0
Vendor ID (Local/Remote): TMMB / IFTN
Loss of Framing (Local/Remote): 0 / 0
Loss of Signal (Local/Remote): 0 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): 0
Error Seconds (Local/Remote): 0 / 0
FEC Errors (Up/Down): 59 / 1,800
CRC Errors (Up/Down): 59 / 29
HEC Errors (Up/Down): 47 / 26
It will be great if Plusnet can help, either give me some information on stopping my line from disconnecting or give me an higher sync rate.
Thanks

[#2]

Your default noise margin is now 15dB which is knocking your speed.
If you try the test socket do you still get the disconnections

[#3]

Hi Oldjim,
Thanks for the reply, how long should I use my router in the test socket?
Thanks

[#4]

A couple of days at least and see if the disconnections stop

[#5]

Hi there,
As Jim says, check if the disconnections stop when your router is plugged into the test socket - if so, there's a fault with your internal wiring or with something plugged into the line (possibly without a filter). If not you've proved a line fault and should raise it to us for investigation at http://faults.plus.net