ADSL Information ( ADSL Firmware Version: 2471201_A)
ATM Statistics TX Cells RX Cells TX CRC errs RX CRC errs
183007 1640813 0 14048
ADSL Status Mode State Up Speed Down Speed SNR Margin Loop Att.
ADSL2+(G.992.5) SHOWTIME 448000 16152958 6 21

well I found the problem

throughput is reduced to 10% of what it should be at around 5pm onwards

http://www.speedtest.net/my-result/3144561567

drop from 15mb only 6 hours ago

16153kbps gives an IP Profile of about 14.2Mbps, resulting in probably a PlusNet Current line speed of 14.1Mbps. Unless you have had a re-sync you couldn't get 15Mbps.

Say perhaps 90% of that on a wired connection to the router gives 12.69Mbps. So 20% of expected.

Still dreadful of course! Is it wired or wireless? Are your lights or central heating on, and weren't before? Or anything else? What about Christmas lights within 5 houses in all directions?

Is there an radio ham in the area - tall aerials on top of the house like taxi firms have these days?

Are you able to post how many FEC and CRC errors you accumulate in an hour after the problem arises ?
I don't do the Mystic Meg thing and look at BQM graphs, but to me, as Bob says, it smacks of interference.

i unplugged my homeplugs and took out the openreach filter and used test socket

I couldn't even run the bt wholesale speed tester then took about 5 minutes to resync after dropping

anyway fault ticket raised

ticket 78137809.

DSL Information ( ADSL Firmware Version: 2471201_A)

ATM Statistics TX Cells RX Cells TX CRC errs RX CRC errs
81843 466012 0 27616


--------------------------------------------------------------------------------

ADSL Status Mode State Up Speed Down Speed SNR Margin Loop Att.
ADSL2+(G.992.5) SHOWTIME 448000 15640329 6 20

For error stats we need to see how many are added over something like an hour when speed is good, so want a start and end value and how long, and the same when speeds are really bad like they were at the time of that lousy speed test.

It isn't the total number of errors that matters. It's the rate they are occurring per minute or hour. Or even per second. I've had some at 100,000 in a day, and other times over 1,000 per second. At high rates like that the router doesn't do much except correct them, so your speed goes bump.

dude you need to monitor your error rate when things are good.

snrm also

then compare to when speed plummets, you should know very quickly from that if its a line issue, if it is you going to have to accept the engineer appointment if you want a hope of it been fixed.

To be fair to plusnet they are subsidising the fee with it been at £60. They are also been generous if they only charge when fault is found your end (openreach policy is harsher, to charge when no fault found OR fault found on customer CPE).

Edited by Chrysalis (Wed 04-Dec-13 22:48:22)

snrm and power levels are rock solid as is attenuation

there is nothing sinister going on other than packet loss and lack of throughput

Agreed Bob.