ADSL2+ Sync / Speeds

In the real world speed tests i am getting just over 12Mb, i am syncing at 14158, which i guess puts me in the 12Mb band, if i can get the sync up to 15264 i should drop in the 13Mb band, the guy on the phone at sky said i should get about 16Mb, but i guess he got this wrong as i would have to sync at 18688 to get in the 16Mb band and i dont think this is possible with my line, am i correct with this or am i totally wrong, cause as i understand it, that is how it looks?.

Edited by deleted (Thu 25-Aug-11 02:48:28)

In reply to a post by tommy_boi:

i am syncing at 14158, which i guess puts me in the 12Mb band

Rather, it puts you in the 14 Mb band. When ISPs talk about speeds, they mean synch speeds and not throughput speeds.

Yeah i think the sync is actually 14Mb, but you dont actually get that do you, i would get around 12Mb speeds with a 14158 sync?.

Yes, but like I say your connection would be described as "14 meg" with your current synch. Throughput is a whole different matter and depends on many more factors.

Throughput is normally about 83% of Sync. So, yes, with a Sync of 14158 Kbps you should be able to actually download at about 11.75 Meg.

Dunno what bands you are imagining. Sky LLU is not operating with banded BT IP Profiles. Unless by "band" you merely mean "about".

Yeah hopefully i can get my sync up to around 15264 so i can get my speed band to 13Mb, not that 12Mb ish isn't fast enough.

Yeah by band i just mean (about), hopefully i can get my sync up to around 15264 which will give me 13Mb speeds, at the moment i am still connected at 14158 which is giving me around the 12Mb ish speeds, to be honest though i think its about all this line can handle, which is good enough really.

Post your router stats to see how it is possible to raise your Sync.

To tweak, you need a router that allows tweaking of Target NM like: http://www.kitz.co.uk/routers/dg834GT_targetsnr.htm

This is my stats.

ADSL Link Downstream Upstream
Connection Speed 14158 kbps 765 kbps
Line Attenuation 29.5 dB 18.1 dB
Noise Margin 7.3 dB 14.9 dB

I notice you are quoting Sync Speeds and IP Profiles as "bands" from Kitz's Speed Calculator. You should ignore the IP Profile; they are not relevant to LLU. The "adsl2+ (LLU)" line is the one you want.

Your line should be capable of about 16 Meg as I told you elsewhere, but I doubt you yourself can tweak it with that Sky router.

Be patient! Remember you are only on the 2nd day of the training period. However I seem to remember that Sky's Target NM is 7 dB, whereas the norm is 6 dB. That could take up to 0.5 Meg off your Sync.

So if you say i should get 16Mb speeds then my line should sync at around 18688 is that correct, i am not sure how i am going to get that out my line as its already on the lowest target SNR of 7 or close to it, or am i wrong here, on LLU would you have to sync at 18688 to get real world 16Mb speeds, also i wouldn't mind changing my router if it means i will get extra Mbs in speed.

Edited by deleted (Thu 25-Aug-11 16:13:30)

No, any prediction I or anyone else will make will be principally in terms of Sync speed. Throughput is only a secondary consideration.

Some woman just called me from sky and said that my line is at the max it can take, so it looks like thats the lot for me.

You could buy a Netgear DG834GT on EBay for about £15-20 new, as I did.

Would the v4 one be ok, as there is one of those in my town, how much more would i get out of the line with that, would it be worth the purchase for the extra Mbs?.

Yes. a V4 is much the same, just w/out 108 Meg wireless which I don't use.

Well, you've seen what I have got. You might gain 1 to 2 Meg going from 7 to 3 dB NM, as long as you don't get too many errors.

Can you still push the SNR down to 3 even though sky have set it at 7?.

Do remember that the Sky T&C stipulate you must use their router, and that you will need to obtain the username and password.