Just got sky installed today :|

  • Thread starter Thread starter Mp4
  • Start date Start date
Another update:

ADSL Link Downstream Upstream
Connection Speed 15357 kbps 945 kbps
Line Attenuation 19.0 dB 10.7 dB
Noise Margin 7.4 dB 15.2 dB
 
With that high snr on the upstream, you will have room to increase by at least half a meg.

Downstream may improve tonight, but otherwise it's at the limit.
 
With the downstream line attenuation at 19dB you should get around what Tealc has estimated, but the noise margin on the upstream side might be limiting the max speed that you can get since a 10.7dB attenuation should get you close to or at the maximum upstream speed.

I'll post my current stats so you can compare (at least for the upstream since my downstream is significantly lower even though I'm a little over a quarter of a mile away from my exchange).

ADSL Link Downstream Upstream
Connection Speed 12282 kbps 1098 kbps
Line Attenuation 31.5 dB 16.7 dB
Noise Margin 4.8 dB 8.6 dB
 
ADSL Link Downstream Upstream
Connection Speed 20091 kbps 1150 kbps
Line Attenuation 18.5 dB 10.7 dB
Noise Margin 6.3 dB 9.2 dB

Chuffed to bits with that :D
 
that's a lot better then what I'm getting, my sky bb was installed on friday.

ADSL Link Downstream Upstream
Connection Speed 2981 kbps 171 kbps
Line Attenuation 43.0 dB 57.0 dB
Noise Margin 9.0 dB 7.8 dB
 
antran said:
that's a lot better then what I'm getting, my sky bb was installed on friday.

ADSL Link Downstream Upstream
Connection Speed 2981 kbps 171 kbps
Line Attenuation 43.0 dB 57.0 dB
Noise Margin 9.0 dB 7.8 dB
Click to expand...


ur line attenuation is quite high though
 
antran said:
that's a lot better then what I'm getting, my sky bb was installed on friday.

ADSL Link Downstream Upstream
Connection Speed 2981 kbps 171 kbps
Line Attenuation 43.0 dB 57.0 dB
Noise Margin 9.0 dB 7.8 dB
Click to expand...

Hard to tell this early as you'd still be under DLM but the upstream attenuation is normally half that of the downstream. DLM may be interfering with this and moving frequencies around and things but I'd say you have noise on the line, and a fair bit of it by the looks of it.

What you can do plug the router into the test socket, thereby removing all extensions and rubbish from your internal telephone circuit and seeing what difference it makes. Beware though that frequent power cuts to the router can highlight the line as unstable and DLM will reduce your speed.

This line would normally be good for 7 Mbit downstream sync rate based on 43 dB.
 
My telephone socket is in a very awkward position, I have to use the line extension that came with the router.

I changed the microfilter and the signal is a bit better.
 
Buy a filtered faceplate, and throw the dongle-type microfilter.

In my experience, the BT faceplate (found on ebay etc) is much more consistent than the generic supplied-with-router dongles, and have the advantage that it looks nicer too.
 
Is all fix now, don't need to buy a new faceplate for the time being.

When I relocated the telephone socket, I didn't twist any of the wires and that caused the high line attenuation. I have gone back and twisted all the wires and everything is back to normal.

Connection Speed 4091 kbps 414 kbps

Line Attenuation 13.0 dB 7.7 dB

Noise Margin 16.6 dB 19.8 dB
 
Ok not quite sure what you mean by twisting the wires but it does seem to have done the trick. Normally the wires inside the telephone cable are twisted and you don't need to do any twisting yourself. Using flat telephone cables over anything but a short length will compromise the line though.

Now you should wait on sky to run their DLM and hope it rises to 20 Mbit as the attenuation you have now is excellent and shows you must be within a kilometre of the exchange.
 
Tealc said:
Now you should wait on sky to run their DLM and hope it rises to 20 Mbit as the attenuation you have now is excellent and shows you must be within a kilometre of the exchange.
Click to expand...

Then that means that I must have a two plus kilometre line run between my place and the exchange which as I mentioned is just over a quarter of a mile away (unless the way the BT openreach engineer patched the line in is causing the increased line attenuation, or it could be the line quality in my area is just garbage).
 
Ring Sky and ask to speak to Tier 2 or the CST (customer solutions team), they can re-profile your line and disable DLM from running in the first 10 days, if you ask nicely :D
 
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