Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[Bog]

Hi
I have been advised from another site to post my Line Stats here for you advise on please.
I have been have very slow speeds recently any advice would be most welcome.
Router is a BT voyager 2091

 Line Mode G.DMT   Line State Show Time  
 Latency Type Interleave   Line Up Time 00:01:59:33  
 Line Coding Trellis Off   Line Up Count 1  
  
 Statistics Downstream Upstream  
 Line Rate 5536 Kbps 448 Kbps  
 Noise Margin 15.1 dB 22.0 dB  
 Line Attenuation 38.0 dB 21.0 dB  
 Output Power 19.8 dBm 11.8 dBm  
 K (number of bytes in DMT frame) 174 15  
 R (number of check bytes in RS code word) 14 16  
 S (RS code word size in DMT frame) 1 8  
 D (interleaver depth) 16 2  
 Super Frames 421914  421912  
 Super Frame Errors 3  0  
 RS Words 28690160  3586252  
 RS Correctable Errors 350  22  
 RS Uncorrectable Errors 4  0  
 HEC Errors 3  0  
 OCD Errors 0  0  
 LCD Errors 0  0  
 ES Errors 0  0  
  

[roseway]

Hi and welcome.

There's not much wrong with those stats, although the 15 dB downstream noise margin suggests that it has been rather unstable, and the target noise margin has been increased to stabilise it. What may have happened is that you've recently had a low speed re-sync, which has caused your IP profile to drop. You can check your IP profile by going to http://speedtester.bt.com/ and entering your details as requested.

If this is what happened, and the low-speed re-sync was just a temporary situation, your IP profile should recover automatically within 5 days. However it would be worth reading this and the associated pages, to get some suggestions for improving the quality of your connection.

There are many other possible causes for low download speeds, such as exchange congestion, ISP congestion, or ISP traffic management measures. If you're a heavy user (particularly if you do a lot of p2p downloading) you would quite likely be caught by traffic management measures.

[mr_chris]

Got caught up on the phone whilst writing this, and in the meantime roseway has replied to me - so rather than edit it I'm just posting it as it was before I realised roseway had posted first!
Hi there Bog, and welcome to the forum Nice to see we're being referred by other sites

The errors don't look excessively bad, to be honest.

When you say slow speeds, what are you trying to do? Is it just general net usage, or downloading P2P / Usenet etc?

Regardless, I would ask you to do some tests that are listed on Kitz's slow speeds page, in particular post the results from the BT performance tester (instructions are about half way down that page under "check your IP profile")

Another couple of questions from me:

1. When you get slow speeds, does it happen at any times in the day, at all?
2. Is the wireless in the Voyager turned on, and are you absolutely sure nobody else is using it (neighbour hacked it, etc)?

I'd also like you to post your line stats after you've been synced a while and getting slow speeds, just to see what the error counters are doing then.

Perhaps some long shots, maybe, but we have to look at all the options first.

[Bog]

Thanks for the speedy replies
Speedtester
Test1 comprises of Best Effort Test:  -provides background information.
    IP profile for your line is - 3000 kbps
    DSL connection rate: 448 kbps(UP-STREAM)  5536 kbps(DOWN-STREAM)
    Actual IP throughput achieved during the test was - 2726 kbps

General net usage, slowest in the morning 8am 11am
Dont know for sure if anybody has hacked in, dont know how to tell
think my router is set up correctly with encrytion etc

regards

Bog

[roseway]

Your IP profile is a bit low for your present connection speed, so you must have connected at a lower speed in the recent past. However it's still not a disastrously low level, and normal internet operations should be satisfactorily fast. If using the net is noticeably slow at times, then it doesn't seem to be due to your ADSL connection, but to traffic management or congestion (or possibly error rates, but less likely).

[mr_chris]

Yeah, that's why I wanted to see a copy of the line stats after or during a slow period.

In fact... if it normally happens in the morning, Bog, would you consider rebooting the router tomorrow morning... using it for a bit.. then if it's gone slow, posting your line stats up after a few hours? Together with a speedtest from BBMax.

That way we could try and eliminate if it was line errors causing the slowdowns or not.

I'll be in til about 1pm tomorrow, so will try and have a look then

[Bog]

Hi again
Line Stats for this morning
 Line Mode G.DMT   Line State Show Time  
 Latency Type Interleave   Line Up Time 00:01:59:07  
 Line Coding Trellis Off   Line Up Count 1  
  
 Statistics Downstream Upstream  
 Line Rate 5728 Kbps 448 Kbps  
 Noise Margin 15.1 dB 22.0 dB  
 Line Attenuation 39.0 dB 21.0 dB  
 Output Power 19.8 dBm 11.8 dBm  
 K (number of bytes in DMT frame) 180 15  
 R (number of check bytes in RS code word) 14 16  
 S (RS code word size in DMT frame) 1 8  
 D (interleaver depth) 16 2  
 Super Frames 420443  420441  
 Super Frame Errors 0  0  
 RS Words 28590180  3573748  
 RS Correctable Errors 104  0  
 RS Uncorrectable Errors 0  0  
 HEC Errors 0  0  
 OCD Errors 0  0  
 LCD Errors 0  0  
 ES Errors 0  0  

speedtest from BBmax

4054 kbps
383 kbps

regards

Bog

  

[roseway]

Your error rates are quite insignificant in those stats, and your download speed shows that your IP profile has risen above the 3000 you reported yesterday. What we really need to see is what your stats are when the slowdown is happening.

[Azzaka]

Is there anyway you can post how often your line drops? and any changes in the SNR.

All posts are right the high SNR is a bit wierd but not all that bad. The speed is increasing whihc suggests its an intermittent connection. If this may be the case try these bas diags and then let us know the line stats.

http://www.zensupport.co.uk/knowledgebase/article.aspx?id=10552