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Standard User petejigsaw
(newbie) Tue 13-Sep-11 18:28:33
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Sky Sync Speed Chart


[link to this post]
 
Hi All

I've just switched to Sky unlimited and am trying to find out what sync speed I should be getting for my line's stats, as what DLM has resulted in me getting is leaving me distinctly underwhelmed.......

I have a connection that's about 700-1000m from the exchange, with d/stream attentuation of 26.5dB and noice margin of 7.8dB. However, I'm being synced at only 15358kbps, which I feel is a good 2000kbps below where my line should be.

My previous connection, on BT 21CN, was syncing at around 18800kbps with the same attentuation, albeit with a lower noise margin target of 6.8dB.

I think Sky's DLM has undercooked my line and the noise margin being a fair bit above the target of 7dB would seem to indicate this.

What do others think, and is there a calculator/chart somewhere that I can use to establish where my attenuation and noise margin should leave my sync speed on a Sky LLU exchange connection?

Many thanks
Standard User XRaySpeX
(knowledge is power) Tue 13-Sep-11 19:04:04
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Re: Sky Sync Speed Chart


[re: petejigsaw] [link to this post]
 
http://www.kitz.co.uk/adsl/max_speed_calc.php

1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 17 Meg Untweaked 19 Meg Tweaked WBC
Standard User ian72
(knowledge is power) Wed 14-Sep-11 08:06:26
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Re: Sky Sync Speed Chart


[re: petejigsaw] [link to this post]
 
Have you asked Sky to put you on the gaming profile? It may be that it is the level of interleaving that is reducing your sync speed?


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Anonymous
(Unregistered)Wed 14-Sep-11 08:54:33
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Re: Sky Sync Speed Chart


[re: ian72] [link to this post]
 
Thanks Guys

I haven't asked for any special tweaks to the line yet. Sky indicate they can increase the sync further, but want to check all my internal set-up before doing so.

As far as that goes, I have the phone line terminate at the master socket with an ADSL faceplate splitter and straight into the router, so there is nothing that I can do to improve the sync.

Cheers
Standard User greenglide
(member) Wed 14-Sep-11 09:33:35
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Re: Sky Sync Speed Chart


[re: petejigsaw] [link to this post]
 
This is exactly the problem that I had and the reason why I left SKY as their product is ********

DLM gave me an underwhelming speed both down and up on a rock solid line but when I completed I got statements like "we have tried giving you an extra 1Mb/s but the line is unstable" and they refuse (or cannot) just let the line negotiate its own rate with a target SNR.

It is designed to minimise calls from customers with unstable lines who do not know what they are doing - ADSL for the inexperienced consumer.

I gave up and went to BE - got an extra 6Mb/s. Job done.

Would never dream of going back to SKY!

Ex <n>ildram , been to SKY MAX - 15,225 Download

Now with BE Unlimited - 21,000 Download 1,200 Upload! Never happier!
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