Speed Advice

[isohunter]

Hi all

I got sky max package 2 months ago and have had nothing but trouble!

I have read through Sat's very interesting posts but being a bit of a newb simpleton have not understood exactly about the signif between line attenuation
and speeds etc and am in desperate need of some advice

If the connection stayed at the top end I would not have a problem but on a daily basis i check the stats and find the dl speeds drop to 700kbps or even lower. I then have to restart the router many times in order to get the connected speed back to something good.

This can't be correct, poss Capped? noise margin seem low?

I am on the verge of changing IPS even though i will still have to pay as this is the worst service i have ever had!

I am 2.48 kilometres from my exchange (as the crow flies)

My stats look like this

ADSL Link Downstream Upstream
Connection Speed 4288 kbps 768 kbps
Line Attenuation 47 db 15 db
Noise Margin 3 db 9 db

Hope this is enough info for you

ISOhunter

[isohunter]

Hi,

I have read Sat's post of connection speed and line attenuation but being a newb not quite understood it fully

Could someone let me know if these details look right and if they think i could increase my speed?

thanks

ADSL Link Downstream Upstream
Connection Speed 4992 kbps 768 kbps
Line Attenuation 50.0 db 31.5 db
Noise Margin 10.6 db 10.0 db

ISOhunter

[Alan b]

Try reading this:

http://www.skyuser.co.uk/forum/speed...html#post84080

[Saturday]

I got sky max package 2 months ago and have had nothing but trouble!

noise margin seem low?

My stats look like this

ADSL Link Downstream Upstream
Noise Margin 3 db 9 db

Yes. Anything under 6db downstream is going to give a sluggish response and under 5db you're close to a disconnection. 3db is terrible.

It is entirely normal for the noise margin to change through the day, repeating the same cycle day after day. You need to "lock" your router's noise margin at a high enough figure so that when the noise margin drops it doesn't go below about 7db. The first sticky in my signature has details of two methods to do this. The Mognuts method is easiest.

I'd also suggest you look at the cabling and faceplate help forum as I suspect you have a line issue as your sync speed is rather low for your attenuation. A poor line will also cause your noise margin to have a larger swing which is probably contributing to your problem.



EDIT: I've just seen your other thread which I've merged with this one (please just start one thread per topic).

Those stats confirm you have a serious line problem. In the first your attenuation is 47db in the second it is 50db. This shouldn't be changing like this. Also, in the first your noise margin was a healthy 10.6db but you were syncing at a higher speed than with a noise margin of 3db before. Your noise margin must be going up and down like a yo-yo.

[isohunter]

Hi,

Thanks for merging did not think the first post went in correctly!

I have now moved the router and plugged it directly into the master socket and run a cat5e cable back to my pc

There is a huge improvement

Do the new stats look reasonable?

cheers


ADSL Link Downstream Upstream
Connection Speed 6368 kbps 768 kbps
Line Attenuation 50.0 db 31.5 db
Noise Margin 7.5 db 10.0 db

(powered up for 5 min)



/usr/sbin/adslctl: ADSL driver and PHY status
Status: Showtime Channel: INTR, Upstream rate = 768 Kbps, Downstream rate = 6432 Kbps
Link Power State: L0
Mode: G.DMT
Channel: Interleave
Trellis: ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.6 10.0
Attn(dB): 15.5 31.5
Pwr(dBm): 19.8 12.5
Max(Kbps): 7040 960
Rate (Kbps): 6432 768
G.dmt framing
K: 202(0) 25
R: 16 16
S: 1 8
D: 64 8
ADSL2 framing
MSGc: 1 1
B: 202 25
M: 1 8
T: 1 1
R: 16 16
S: 1.0788 8.6153
L: 1624 208
D: 64 8
Counters
SF: 14995 14993
SFErr: 189 0
RS: 1019728 127440
RSCorr: 27012 4
RSUnCorr: 9801 0

HEC: 110 0
OCD: 16 0
LCD: 0 0
Total Cells: 3844060 0
Data Cells: 7256 0
Drop Cells: 0
Bit Errors: 0 0

ES: 18 0
SES: 16 0
UAS: 38 0
Total time = 5 min 13 sec
SF = 14995
CRC = 189
LOS = 168
LOF = 0
ES = 18
Latest 1 day time = 5 min 13 sec
SF = 14995
CRC = 189
LOS = 168
LOF = 0
ES = 18
Latest 15 minutes time = 5 min 13 sec
SF = 14995
CRC = 189
LOS = 168
LOF = 0
ES = 18
Previous 15 minutes time = 0 sec
SF = 0
CRC = 0
LOS = 0
LOF = 0
ES = 0
Previous 1 day time = 0 sec
SF = 0
CRC = 0
LOS = 0
LOF = 0
ES = 0

thanks for all the help so far

ISOhunter

[Saturday]

Do the new stats look reasonable?

Hard to say as the router wasn't run long or hard enough to pass much traffic. Even so there's quite a high error level showing.

However, you are now syncing at a very good rate for your attenuation.

[isohunter]

Hey, thanks for the help

I left it on for about 2 hrs and took the stats (below)

I am really worried becuase even though the connection speed is much better and speed tests have been much better the stability of the connection is awful. Up and down like a yo yo

sits around noise margin of 7 for ages then start dropping off to even below 4

hope you can give me some advice from the stats

thanks again you stars!

/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): 4.3 10.0
Attn(dB): 50.0 31.5
Pwr(dBm): 19.7 12.5
Max(Kbps): 6752 960
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: 394213 394211
SFErr: 75510 6
RS: 26806494 3350793
RSCorr: 9733436 34
RSUnCorr: 1463026 0

HEC: 72793 4
OCD: 713 2
LCD: 0 0
Total Cells: 95106177 0
Data Cells: 14282254 0
Drop Cells: 0
Bit Errors: 0 0

ES: 2049 0
SES: 1473 0
UAS: 23 0
Total time = 1 hours 52 min 15 sec
SF = 394213
CRC = 75510
LOS = 9
LOF = 0
ES = 2049
Latest 1 day time = 1 hours 52 min 15 sec
SF = 394213
CRC = 75510
LOS = 9
LOF = 0
ES = 2049
Latest 15 minutes time = 7 min 15 sec
SF = 25642
CRC = 12681
LOS = 0
LOF = 0
ES = 375
Previous 15 minutes time = 15 min 0 sec
SF = 52872
CRC = 37258
LOS = 1
LOF = 0
ES = 694
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 = 52989
CRC = 18236
LOS = 2
LOF = 0
ES = 576
15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
SF = 52931
CRC = 7318
LOS = 4
LOF = 0
ES = 393
15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
SF = 52930
CRC = 5
LOS = 2
LOF = 0
ES = 4

[Steve case]

Your stats taken with your router plugged into the test socket do suggest that you have a wiring issue as you were able to get a better synch speed. You said you plugged your router into the master socket. However have you tried the test socket (the one accessed by unscrewing the lower half of the faceplate on your master socket)? If not try that, as there may still be some noise problems associated with extension wiring (using the test socket effectively disconnects all your extension wiring). Try running for a couple of hours and then post your stats again.

If you have already done that, then I suggest you use the Mognuts utility to set your target noise margin to something higher than the 7 dB default value (I suggest starting with 14 dB - you may be able to reduce it subsequently) this will give you a lower synch speed, but should improve your conection stability).

[isohunter]

Thanks will try that as soon as back from work today!



will post some stats later

cheers

ISOhunter

[isohunter]

Hi ,

I have had the router oin for ages now

what do you think of the stats?

cheers

/usr/sbin/adslctl: ADSL driver and PHY status
Status: Showtime Channel: INTR, Upstream rate = 768 Kbps, Downstream rate = 5504 Kbps
Link Power State: L0
Mode: G.DMT
Channel: Interleave
Trellis: ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 8.1 9.0
Attn(dB): 50.0 31.5
Pwr(dBm): 19.6 12.5
Max(Kbps): 6080 928
Rate (Kbps): 5504 768
G.dmt framing
K: 173(0) 25
R: 16 16
S: 1 8
D: 64 8
ADSL2 framing
MSGc: 1 1
B: 173 25
M: 1 8
T: 1 1
R: 16 16
S: 1.0919 8.6153
L: 1392 208
D: 64 8
Counters
SF: 4746682 4746680
SFErr: 137880 166
RS: 322774432 40346780
RSCorr: 102335628 1424
RSUnCorr: 3645636 0

HEC: 127554 116
OCD: 2077 12
LCD: 2 4
Total Cells: 1042878846 0
Data Cells: 179469525 0
Drop Cells: 0
Bit Errors: 0 0

ES: 4120 0
SES: 2360 0
UAS: 27 0
Total time = 22 hours 25 min 35 sec
SF = 4746682
CRC = 137880
LOS = 16
LOF = 0
ES = 4120
Latest 1 day time = 22 hours 25 min 35 sec
SF = 4746682
CRC = 137880
LOS = 16
LOF = 0
ES = 4120
Latest 15 minutes time = 10 min 35 sec
SF = 37345
CRC = 1
LOS = 0
LOF = 0
ES = 1
Previous 15 minutes time = 15 min 0 sec
SF = 52931
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 = 52930
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 = 52990
CRC = 0
LOS = 2
LOF = 0
ES = 1

ISOhunter