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Sudden speed boost

Grafter
Posts: 53
Registered: ‎19-03-2010

Sudden speed boost

I have had poor speed for some time and frankly was considering switching back to BT - "why do I have to do all of the analysis on what is going on " was my attitude....when lo and behold today i had a signnificant change to a speed never before achieved with plusnet .....WHY? I have made no changes to anything in the last 24 hours but ....
Today 08:21 1276 kbps (160kB/s) 374 kbps (46.8kB/s) 
Yesterday 08:42 768 kbps (96kB/s) 319 kbps (39.9kB/s) 
Friday 10:40 713 kbps (89.1kB/s) 252 kbps (31.5kB/s) 
Friday 08:27 696 kbps (87kB/s) 323 kbps (40.4kB/s) 
Friday 07:29 696 kbps (87kB/s) 236 kbps (29.5kB/s) 
Aug 18, 16:40 695 kbps (86.9kB/s) 367 kbps (45.9kB/s) 
Jun 29, 11:33 651 kbps (81.4kB/s) 332 kbps (41.5kB/s) 
May 25, 07:43 1125 kbps (141kB/s) 331 kbps (41.4kB/s) 
May 4, 07:27 1177 kbps (147kB/s) 370 kbps (46.3kB/s) 
Apr 29, 15:53 1162 kbps (145kB/s) 353 kbps (44.1kB/s) 
Can anyone explain please ?
14 REPLIES 14
Grafter
Posts: 614
Registered: ‎04-11-2008

Re: Sudden speed boost

Perhaps the BT IP profile has increased to 1000 hence the increase in sync rate?
What results do you get from this BT tester?
Grafter
Posts: 53
Registered: ‎19-03-2010

Re: Sudden speed boost

BT tester gives these figures
Download speedachieved during the test was - 1077 Kbps
For your connection, the acceptable range of speeds is 400-2000 Kbps.
Additional Information:
Your DSL Connection Rate :1440 Kbps(DOWN-STREAM), 448 Kbps(UP-STREAM)
IP Profile for your line is - 1250 Kbps
Thanks for interest
Mike
Grafter
Posts: 9,786
Registered: ‎16-06-2010

Re: Sudden speed boost

Hi mikesin,
Your previous BT profile was 750, and has now increased to 1250. This is probably because your connection has settled after a period of instability and as such the DLM (BT's system that monitors the line's stability) has increased to show this.
Jojo Smiley
Community Veteran
Posts: 3,789
Thanks: 1
Registered: ‎08-06-2007

Re: Sudden speed boost

Quote from: mikesin
"why do I have to do all of the analysis on what is going on " was my attitude....

Because, your own internal wiring and equipment (which is a very significant cause of connection and speed problems) is your own responsibility.  If you can't be bothered to check a few basic steps, then the problem can reoccur.
Of course, if you could post a few more stats on your line, then it may be possible to increase your speed further, stabilise the line, or find a fault.  That's if we can be bothered.
B.
Community Veteran
Posts: 4,927
Thanks: 143
Fixes: 25
Registered: ‎14-07-2009

Re: Sudden speed boost

I'm actually thinking of starting my own ISP company called LazyNet for people who don't want to do any work themselves.  LazyNet support engineers will do all the set-up and solve any technical problems with your internet connection.  Of course, LazyNet subscribers will have to pay £100 per month for the service because all that hands-on technical support will not come cheap.  Do I have any takers?
[Plusnet: I'm only joking]     
Grafter
Posts: 53
Registered: ‎19-03-2010

Re: Sudden speed boost

Thanks for the positive responses and for the negative ones - guess you know the response.
The wiring in my house has been checked on a number of occasions. I havetried relocating the router to the entry point of the BT circuit . I have hacked into my old BT router and run speed tests with that and this has given me BER  which shows clean BT line and internal wiring.
So I have been bothered in the past to do all of the things I could - even removing the third wire from the BT circuits but these reconfiguration events get very tedious when it is shown to have no bearing on the erratic  speed I am achieving.
So why do i get instability that causes the line speed to fall away and what can I do about this ?
Thanks to Apprentice and Jojo
Community Veteran
Posts: 4,927
Thanks: 143
Fixes: 25
Registered: ‎14-07-2009

Re: Sudden speed boost

Quote from: mikesin
So why do i get instability that causes the line speed to fall away and what can I do about this ?

With the amount of information you have provided so far, nobody can say.  Plusnet may be able to infer something from their records but we need to know what your router is up to, as Barry wrote earlier.
Grafter
Posts: 53
Registered: ‎19-03-2010

Re: Sudden speed boost

What do I do to supply that information?
Thanks 
Community Veteran
Posts: 38,460
Thanks: 1,034
Fixes: 62
Registered: ‎15-06-2007

Re: Sudden speed boost

We need the attenuation, speeds and noise margin from your router - this will tell you how to get it http://www.kitz.co.uk/adsl/frogstats.php
Grafter
Posts: 53
Registered: ‎19-03-2010

Re: Sudden speed boost

Information from Speedtouch ST516
Uptime: 2 days, 1:01:46

DSL Type: G.992.1 annex A

Bandwidth (Up/Down) [kbps/kbps]: 448 / 1,440

Data Transferred (Sent/Received) [kB/kB]: 0.00 / 1.00

Output Power (Up/Down) [dBm]: 11.5 / 15.0

Line Attenuation (Up/Down) [dB]: 31.5 / 59.0

SN Margin (Up/Down) [dB]: 15.0 / 7.0

Vendor ID (Local/Remote): TMMB / ALCB

Loss of Framing (Local/Remote): 0 / 0

Loss of Signal (Local/Remote): 0 / 0

Loss of Power (Local/Remote): 0 / 0

Loss of Link (Remote): 0

Error Seconds (Local/Remote): 20 / 0

FEC Errors (Up/Down): 91 / 288,585

CRC Errors (Up/Down): 91 / 13,383

HEC Errors (Up/Down): 59 / 11,920
Thanks
Community Veteran
Posts: 38,460
Thanks: 1,034
Fixes: 62
Registered: ‎15-06-2007

Re: Sudden speed boost

The critical part is this
Bandwidth (Up/Down) [kbps/kbps]: 448 / 1,440

Line Attenuation (Up/Down) [dB]: 31.5 / 59.0

SN Margin (Up/Down) [dB]: 15.0 / 7.0
Your line is doing the best it can given the noise margin of 7dB
The only possibility of improving it is to try the test socket but it may not make much difference.
You need to be aware that if your router resyncs over night or indeed in the evening the speed will be significantly lower and will drop the IP profile down to 1000 or even 750
You can see the numbers here http://www.kitz.co.uk/adsl/IPprofile.htm#IP_profile_calculated (near the bottom of the page)
At present you have just crept into the 1250 band
Grafter
Posts: 53
Registered: ‎19-03-2010

Re: Sudden speed boost

If this is what you mean by resync 
"Aug 25 08:21:20 SNTP Synchronised to server: 212.159.13.50 "
" Aug 25 07:21:20 SNTP Synchronised to server: 212.159.6.9 "

my speedtouch does it on an hourly basis.
Is this normal? and can I stop it?
thanks 
Community Veteran
Posts: 38,460
Thanks: 1,034
Fixes: 62
Registered: ‎15-06-2007

Re: Sudden speed boost

No
That is your router checking the time.
A resync is where the router disconnects and reconnects to the internet connection.
When it does that it negotiates the connection speed with the exchange based upon the default noise margin set by the exchange. I assume that yours is 6dB which is the lowest (i.e. best) value so you get the highest speed.
However the noise margin is the margin over the noise on the line (electrical noise not audible noise) and in the evening this background noise increases and reduces the speed it will connect at.
To use an analogy
If you were listening to your radio across a quite room you could hear it easily and understand the words. If the room is full of people chattering then to hear the radio properly you would need to move closer to it.
To explain further - To hear the radio and understand the words the sound from the radio must be higher than the surrounding noise (this is the noise margin) and in the case of the broadband signal the way it overcomes this is to reduce the speed of connection.
Grafter
Posts: 53
Registered: ‎19-03-2010

Re: Sudden speed boost

Ok Jim, thanks for interest and guidance - I do understand the SNR stuff etc. If I find that my speed drops back to below 1.0MB then I will switch the router off and leave it for a while and try to resync at a higher speed - thanks again to all useful contributors
Mikesin