Slow upload speed and huge variance in download speed

[#1]

Hi,
I have a Plusnet Sagemcom 2704N router and I'm getting very slow upload speeds (0.19Mbps), and the upload speed fluctuates between ~4Mbps and 15Mbps.
I don't know if maybe the upload speed is capped?

My stats are:
Statistics -- xDSL

Mode: ADSL_2plus
Traffic Type: ATM
Status: Up
Link Power State: L0

Downstream Upstream
Line Coding(Trellis): On On
SNR Margin (1 dB): 6.2 6.4
Attenuation (1 dB): 19.5 10.0
Output Power (1 dBm): 20.8 11.9
Attainable Rate (Kbps): 18264 1216

Path 0 Path 1
Downstream Upstream Downstream Upstream
Rate (Kbps): 18027 984 0 0

MSGc (# of bytes in overhead channel message): 51 14 0 0
B (# of bytes in Mux Data Frame): 213 123 0 0
M (# of Mux Data Frames in FEC Data Frame): 1 1 0 0
T (Mux Data Frames over sync bytes): 3 1 0 0
R (# of check bytes in FEC Data Frame): 0 0 0 0
S (ratio of FEC over PMD Data Frame length): 0.3792 4.0000 0.0 0.0
L (# of bits in PMD Data Frame): 4514 248 0 0
D (interleaver depth): 1 1 0 0
Delay (msec): 0 1 0.0 0.0
INP (DMT symbol): 0.00 0.00 0.0 0.0

Super Frames: 0 0 0 0
Super Frame Errors: 2466 3949 0 0
RS Words: 0 592402 0 0
RS Correctable Errors: 0 0 0 0
RS Uncorrectable Errors: 0 0 0 0

HEC Errors: 4847 3857 0 0
OCD Errors: 51 0 0 0
LCD Errors: 51 0 0 0
Total Cells: 3027055062 399642302 0 0
Data Cells: 108018945 37070247 0 0
Bit Errors: 0 303350 0 0

Total ES: 1914 3789
Total SES: 10 4
Total UAS: 611 601

[#2]

Hi there,
Diagnostic checks aren't showing any obvious causes.
Please head over to http://faults.plus.net if that continues to be a problem for you.

[#3]

Hi lgreensh,
A warm welcome to the foums.
Looking at the stats you've posted, the US is not capped.  The US synch is a little lower than one would hope for on a line with your attenuation.
Was the speed test done over wifif or over an Ethernet cable with wifi turned off?  Connecting a PC to the router with a cable which has otherwise been connected over wifi provides no assurance that the cable connection is being used in preference to wifi if it is still configured and turned on.
Is there any noise on the phone line?  Dial 17070 option 2.
Is the router plugged into the master socket?  Are there any other extensions (in use or not)?  Take a look at the speed issues thread and see if there is anything there which might help you.