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Author Topic: Speed issue  (Read 1392 times)

acwest

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Speed issue
« on: December 19, 2009, 10:57:07 AM »

Hello, i have recently had issues with my broadband connection.

Firstly i think it began when my cordless phone suddenly started to disconnected the internet when picked up. Strangly it had never happened before. Although it has stopped disconnecting now.

Next when i run a speed text i have found that my synch speed has dropped by over half. And also my IP Profile has halved.

Here is some information which i think will help solve the issue.

The tests have been done using the BT test socket.

http://i46.tinypic.com/x28p74.jpg

http://i48.tinypic.com/2w20vmr.png

http://i50.tinypic.com/2vkzx8z.png

http://i46.tinypic.com/2r6ch1v.png
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kitz

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Re: Speed issue
« Reply #1 on: December 19, 2009, 02:56:59 PM »

Hi

Looking at the images, you are now syning back at over 6000 kbps.   

It looks like at sometime in the past few days you have had a bad sync in the region of 4544 kbps to 5088 kbps  which has caused the 4000 IP profile.  If your line stays stable then this should hopefully increase again over the next few days.

Your {url=http://www.kitz.co.uk/adsl/linestats.htm#target_SNR] target SNR[/url] looks like its set at 15dB, which will also be costing you some sync speed.    This is an indication that your line is - or has been unstable at some point in the past.

Your attenuation is only 12dB which means that you must live fairly near the exchange..  and you should be getting much better speeds than you are doing...  although some of this could be attributable to the now high target SNR.  At a guess from your line stats this increase on your line could be costing you around 2.5 to 3Mb.

All this is perhaps pointing to some sort of problem with your internal wiring/equipment.. or a fault on the line.   
In view of what you say about the cordless phone  its highly likely that what ever was going on with that has caused the DLM to try and stabilise your line.

IF the problem with the cordless phone has now stopped, then it shouldnt take too long for the IPprofile to recover although it could be quite a while longer before the DLM takes you back down to the default target SNR.  It could well be that the phone is still causing slight problems on your line - perhaps routerstats could graph whats going on?

Ive had a quick look at your error rates and both FECs and CRCs now seem to be normal, so it looks like things are ok again, but it does depend on how long the router was up for when those caps where taken and if there was a reset in between.
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