Trouble with download speed

[Bloater]

Some general advice required, from those more knowledgable than myself, before I vent direct to Sky.

I have had Sky max for some time now, late last year rings a bell, and up till now, things haven't been too bad. With an attenuation of 44dB Sky refused to connect me via ADSL2+ in order to maintain a stable connection. This connection was just over the 6Mb mark. All seemed well, until about 2 months ago, where every evening I had to reboot the router, as the noise margin had dropped into the 5's and nothing would work. Fair enough I thought, it is the evening.

However I have had to continually reboot the router over the last few weeks, on average every other evening, and the connection speed always drops to get back to a sensible noise margin. Now my connection is under the 5Mb mark, and so I have lost over 1Mb of connection speed, and I am not happy about it.

So before I go to Sky and ask them why, my attenuation is still 44dB, any suggestions from the kowledge base on here. If I continue like this, I'll end up with no connection at all. I thought for 44dB I should be in excess of 6Mb anyway, but Sky says not, in fact Sky says don't believe the speed checkers, personally, I don't believe Sky.

I know the noise margin drops in the evenings, but I seem to be having a cumulative thing happening. It drops the sync speed to get the noise margin, then a couple of evenings later, I have to do it again, and so lose some more of my sync speed.

I have tried the obvious, removed the ring wire, checked the filters etc, but no good. Also bear in mind that my attenuation has stayed at 44dB throughout.

Any thoughts??

Bloater

[Saturday]

Your attenuation determines the maximum sync speed. Noise will then reduce this. It would appear your line has noise.

[Bloater]

Thanks Saturday - I know my line has noise, hence the lower than expected initial sync speed.

My question is why however is my line getting slower. As I tried to explain, my inital sync was 6.1 Mb with a NM of about 8. It worked well, no problems. Then during the evening, the NM dropped to the 6's, so I rebooted the router to get a better connection. A sync of 5.9 or so got the NM back to nearer 8. I expected the NM to then go higher during the following day, but it didn't, it stayed there, and then dropped again resulting in a further reboot, and re-sync at 5.7Mb.

This has continued over the last few weeks, such that now I am down to 4.9Mb, and last night the NM was below 7 again. I left it. I can't understand why the NM does not return to a higher level during the day, and then drop back down in the evening. All mine seems to do is keep droppping, thus requiring a reboot, and thus losing yet more connection speed. Throughout all this my attenuation has stayed at 44dB

So what to do? Sky to investigate the issues - highely unlikely. Or report a fault to BT, stating that my line appears to be getting more noise on it on a daily basis.

Cheers

[Koala5]

Could try posting your detailed stats see if we can spot anything. Also check uPNP is switched off.

Go to the utility web site: Sky Netgear DG834GT utility version 0.4
Click the “Get” detailed modem stats button and click “OK”.
Enter the router login user name and password.
At the next screen, click the back button on your browser.
Click the “Download” netgear.cfg button.
What you do next depends on your operating system. On Windows XP, click the “Save” button to save the file to your hard disk. (If you click “Open”, you may find that the file association is one that doesn’t handle carriage returns the same way as the router, hence the reason for saying “Save”.)
Open the file in WordPad (not notepad).

[MrStabby]

Have you tried your test socket to check it's not noise that's being introduced locally?

[Bloater]

Here you go, detailed stats. I see the problem I think.

/usr/sbin/adslctl: ADSL driver and PHY status
Status: Showtime Channel: INTR, Upstream rate = 768 Kbps, Downstream rate = 4928 Kbps
Link Power State: L0
Mode: G.DMT
Channel: Interleave
Trellis: ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 7.8 14.0
Attn(dB): 44.0 27.0
Pwr(dBm): 19.8 9.9
Max(Kbps): 5568 1184
Rate (Kbps): 4928 768
G.dmt framing
K: 155(0) 25
R: 16 16
S: 1 8
D: 64 8
ADSL2 framing
MSGc: 1 1
B: 155 25
M: 1 8
T: 1 1
R: 16 16
S: 1.1025 8.6153
L: 1248 208
D: 64 8
Counters
SF: 14536931 14536929
SFErr: 67423 168
RS: 988511326 123563896
RSCorr: 679919226 1966
RSUnCorr: 86797 0

HEC: 56311 150
OCD: 4 0
LCD: 0 0
Total Cells: 2872201378 0
Data Cells: 21000668 0
Drop Cells: 0
Bit Errors: 0 0

ES: 24564 0
SES: 366 0
UAS: 21 0
Total time = 1 days 20 hours 39 min 20 sec
SF = 14536931
CRC = 67423
LOS = 347
LOF = 0
ES = 24564
Latest 1 day time = 20 hours 39 min 20 sec
SF = 4374054
CRC = 49280
LOS = 119
LOF = 0
ES = 13069
Latest 15 minutes time = 9 min 20 sec
SF = 32935
CRC = 268
LOS = 4
LOF = 0
ES = 202
Previous 15 minutes time = 15 min 0 sec
SF = 52989
CRC = 2312
LOS = 0
LOF = 0
ES = 713
Previous 1 day time = 24 hours 0 sec
SF = 5082263
CRC = 13130
LOS = 103
LOF = 0
ES = 8206
15 minutes interval [-30 min to -15 min] time = 15 min 0 sec
SF = 52930
CRC = 996
LOS = 0
LOF = 0
ES = 573
15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
SF = 52931
CRC = 3568
LOS = 0
LOF = 0
ES = 815
15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
SF = 52930
CRC = 3609
LOS = 0
LOF = 0
ES = 833


What to do with all these errors. A month ago I was on 6.1 Mb with the same attenuation, and the same noise margin. Is this a BT thing. I am plugged in to the master socket, will try the test socket.

Bloater

[Bloater]

I have just tested in the test socket, and connected at 6144 kbps with a noise margin of 10.9. I have now reconnected everything back as it was, and have a connection of 6144 kbps and a noise margin of 10.8. All I need now is for Sky to remove the cap they have put on the line, and see how fast we can go. I also checked some other sockets around the house, and removed ring wires where I found them.

Here's hoping its fixed.

Bloater

[IWasNotTheEnemy]

you won't get over 8mb but should see 7...

[Bloater]

More stats after the fix. SNR has stayed at 10.1 and above all evening, and the log below shows considerably less errors. I know its only been a short while, but looks good so far.

/usr/sbin/adslctl: ADSL driver and PHY status
Status: Showtime Channel: INTR, Upstream rate = 768 Kbps, Downstream rate = 6144 Kbps
Link Power State: L0
Mode: G.DMT
Channel: Interleave
Trellis: ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 10.1 14.0
Attn(dB): 44.0 27.0
Pwr(dBm): 19.8 9.3
Max(Kbps): 7552 1216
Rate (Kbps): 6144 768
G.dmt framing
K: 193(0) 25
R: 16 16
S: 1 8
D: 64 8
ADSL2 framing
MSGc: 1 1
B: 193 25
M: 1 8
T: 1 1
R: 16 16
S: 1.0824 8.6153
L: 1552 208
D: 64 8
Counters
SF: 681566 681564
SFErr: 11 0
RS: 46346530 5793294
RSCorr: 10349151 154
RSUnCorr: 158 0

HEC: 11 0
OCD: 0 0
LCD: 0 0
Total Cells: 167906171 0
Data Cells: 3471514 0
Drop Cells: 0
Bit Errors: 0 0

ES: 11 0
SES: 4 0
UAS: 50 0
Total time = 3 hours 14 min 30 sec
SF = 681566
CRC = 11
LOS = 4
LOF = 0
ES = 11
Latest 1 day time = 3 hours 14 min 30 sec
SF = 681566
CRC = 11
LOS = 4
LOF = 0
ES = 11
Latest 15 minutes time = 14 min 30 sec
SF = 51166
CRC = 2
LOS = 0
LOF = 0
ES = 1
Previous 15 minutes time = 15 min 0 sec
SF = 52930
CRC = 0
LOS = 0
LOF = 0
ES = 0
Previous 1 day time = 0 sec
SF = 0
CRC = 0
LOS = 0
LOF = 0
ES = 0
15 minutes interval [-30 min to -15 min] time = 15 min 0 sec
SF = 52990
CRC = 1
LOS = 1
LOF = 0
ES = 1
15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
SF = 52930
CRC = 2
LOS = 0
LOF = 0
ES = 2
15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
SF = 52931
CRC = 0
LOS = 1
LOF = 0
ES = 1


Cheers.

Bloater

[isohunter]

Hi,

I have been having a similar type of problem.

I have had my connection for about 6 months now and have nevr been happy with it

I thought i had cracked it when i removed the BT face plate and plugged direct into the test socket , got a connection of aroun6.2 which i was well happy with considering i am 2.4km away from the exchange and have a line attenuation of 50db

However whenever i leave the computer for a little time i come back only to find it has dropped to 1000kbps or even 100kbps with the attenuation still at 50db but a very high noise margin of around 24 or something

This has got worse recently and i am really frustrated!!

Any ideas ?

stats are below!

cheers,

isohunter

/usr/sbin/adslctl: ADSL driver and PHY status
Status: Showtime Channel: INTR, Upstream rate = 768 Kbps, Downstream rate = 1376 Kbps
Link Power State: L0
Mode: G.DMT
Channel: Interleave
Trellis: ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 26.8 12.0
Attn(dB): 50.0 31.5
Pwr(dBm): 18.1 12.5
Max(Kbps): 1536 1024
Rate (Kbps): 1376 768
G.dmt framing
K: 44(0) 25
R: 16 16
S: 4 8
D: 32 8
ADSL2 framing
MSGc: 1 1
B: 98 25
M: 2 8
T: 1 1
R: 16 16
S: 2.1616 8.6153
L: 792 208
D: 64 8
Counters
SF: 1349665 1349663
SFErr: 791 0
RS: 22944310 11472135
RSCorr: 116416 200
RSUnCorr: 7257 0

HEC: 676 0
OCD: 19 0
LCD: 0 0
Total Cells: 74448552 0
Data Cells: 23830365 0
Drop Cells: 0
Bit Errors: 0 0

ES: 1620 0
SES: 1353 0
UAS: 164 0
Total time = 18 hours 59 min 11 sec
SF = 4006286
CRC = 67068
LOS = 25830
LOF = 0
ES = 1620
Latest 1 day time = 18 hours 59 min 11 sec
SF = 4006286
CRC = 67068
LOS = 25830
LOF = 0
ES = 1620
Latest 15 minutes time = 14 min 11 sec
SF = 50049
CRC = 0
LOS = 0
LOF = 0
ES = 0
Previous 15 minutes time = 15 min 0 sec
SF = 52989
CRC = 0
LOS = 0
LOF = 0
ES = 0
Previous 1 day time = 0 sec
SF = 0
CRC = 0
LOS = 0
LOF = 0
ES = 0
15 minutes interval [-30 min to -15 min] time = 15 min 0 sec
SF = 52931
CRC = 0
LOS = 0
LOF = 0
ES = 0
15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
SF = 52930
CRC = 0
LOS = 0
LOF = 0
ES = 0
15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
SF = 52931
CRC = 0
LOS = 0
LOF = 0
ES = 0