on 06-02-2013 02:31 PM
This is a message which I sent to sky support via email:
"The speeds I am getting on my connection don't match the potential of the line.
Stats from router:
As you can see, the SNR margin is particularly high on the Upload so I would like to request that both upload and download are set back to a target SNR margin of 7db. The stats shown above stay constant, they have been as they are now for 72hours of monitoring with little variation. The line attenuation is high enough to indicate that the maximum data rates should be possible. I would also like to request that the Interleave is set to 8ms (I know you don't advertise Fastpath as a service but if it's possible to set it to 0ms then this would be appreciated). I am well aware that setting the line to a 7db target may induce errors on the line. I am more than willing to monitor this and request changes as necessary. To clarify, I do not want to be set on DLM again. This has regularly proven itself to be useless and to set the sync rates far below the potential of the line. Regards"
The response I received:
"Thank you for your email about Slow connection with Sky Broadband.
I have reviewed your account and find that you are getting the speed that is best suited for your Line and that we would not be able to change what you have requested as this may cause you line to become unstable. I can see that the noise and the speed that you are getting are within your speed that we stated that we would give you. So I am sorry but we will not be changing anything on your Broadband speed.
I hope this information is of use to you and if you have any further enquires about this please contact Sky on 08432 16 17 18 or reply back to this email.
Now, to be fair, there is only a little space for improvement on the download speed and I'm OK with that.
However, the upload speed has significant room for improvement. The SNR Marigin is high at 20db and the attenuation is high enough to indicate a good line and that it can be improved.
The exchange is less than 650metres away and, once upon a time when I first joined sky, I had a steady 20Mb Down and 1.3Mb Up. This lasted for about 6months beofre someone, unbeknownst to me, decied that DLM needed to run again and I haven't seen that speed since.
So, I'm asking here, can you please do something about this? It should be better than it is. Yes, I've checked all the cabling in the house and there is no noise on the line. All devices are correctly filtered and my Modem is on the Master socket. The Modem has been restarted at peak and off peak and the sync rate never changes, the SNR margin doesn't change either (nothing significant anyway, less that .5 fluctuation).
I would also like to point out that the setimated speed for my line was as follows:
Download speed setting
Your connection has been set to a download speed of up to 4.1Mbps .
Upload speed setting
Your connection has been set to an upload speed of up to 0.5Mbps .
Considering what the estimated download was ( along with the speeds I have previously had), I consider this estimation to be worthless.
Solved! Go to the solution
on 08-02-2013 04:51 PM
Sorry to see you are still having an issue with your speed.
Can you post us your stats from the test socket and with a new microfilter , this will allow us to see if we can hep in anyway?
To get the full router statistics go to http://192.168.0.1 then log in with admin and sky and click on show statistics.
on 08-02-2013 04:57 PM
Thank you for the repsonse. I'm literally about to go out for a weekend away but will get on to this as soon as I'm back. I actually have a VDSL Faceplate fitted on the Master socket from Open Reach so do not use seperate Microfilters, I'll get the stats from the Test Socket again though.
on 11-02-2013 08:03 PM
So, I connect the Router to the test socket last night and left it to settle down and sort its life out. I changed the Microfilter when I got in 3 hours ago just to be sure I hadn't dug out a dodgy one and nothing changed (I have a VDSL faceplate filter so don't normally need microfilters).
|15693 kbps||466 kbps|
|25.8 dB||17.1 dB|
|7.8 dB||22.2 dB|
As you can see, the connection is pretty much identical in the test socket. The Upload SNR margin is still ~20db and a bit more could probably be squeezed out of the download. I know that the DLM system has changed since it was last run so wouldn't be completely adverse to having DLM Training run on my line again. However, the Line Attenuation indicates that I should be able to run at the maximum sync rates on both download and upload if set correctly.
on 12-02-2013 03:59 PM
Thank you for your reply.
Can you confirm that you have tried everything in these troubleshooting guides as they can help with download and upload speeds?
I look forward to hearing from you.
on 12-02-2013 05:31 PM
on 12-02-2013 06:41 PM
on 15-02-2013 02:07 PM
So, after a few quick PM's, this is the result of after the first adjustment. Of course, this needs to be monitored for stability but I'm dead chuffed with this! My Upload has doubled and the ping has halved!
A genuine thank you to the guys here on the forum, much more satisfying than dealing with the call centre has been in the past. Even if it's slower way of communicating
on 16-02-2013 11:20 AM