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Speed Regrade Advice

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Speed Regrade Advice

I just requested PN to do a whoosh test on my line to try and determine what possible speed I may obtain on it. I'm currently on a 0.5Mb stable sync with the exchange but would quite like to push this up to 1Mb if possible.

The results of the whoosh test are:

Circuit In Sync
Upstream xDSL Link Info
Loop Loss 35 dB
Cell Count 445007
Downstream xDSL Link Info
Loop Loss 60dB

which is exactly what my router reports. Also, the SNR ratio on my line seems to fluctuate between 13-20dB (according to the router).

I read on here that some people are running happily on 1Mb with a line attentuation a few dB above 60dB so would it be worth my while putting in a force regrade request up to 1Mb?

I would ultimately like 2Mb and I'm going to run this past the forum as well. I understand that for 2Mb, the line attentuation needs to be no more than 45dB ish. However, my Draytek router actually reports that the maximum downstream rate I could obtain is 3840000 bps which is far beyond 2Mb. This would suggest to me that, even though the line attenuation is 60dB, the router could still manage to get a full 2Mb sync with the exchange. Would this be a reasonable observation or am I missing something? (or would it obtain an unstable 2Mb sync etc?).

Any advice much appreciated.
5 REPLIES
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Speed Regrade Advice

maybe it means the maximum data rate (downstream) that the router could actually handle is: 3840000 bps. I'd like to know what that is in KBPS/MBPS. I'd try sticking to your 512/1 meg, more and more people are pushing to 2 meg and the quality of service is really starting to go down. 1 year ago and you'd barely ever see a high ping due to network overload, or low dl speeds. Now it's every day at a certain time even on premier package. I find that extremely unacceptable, be interesting to see whether I could stop my contract and migrate to another ISP.
N/A

Speed Regrade Advice

I'm not expecting to get full 2Mb speeds (if I was on 2Mb) all the time - broadband is not that type of internet connection so this doesn't bother me. I would like a bit faster than 0.5Mb though Smiley

The 3840000 bps speed is just below a 4Mb sync rate. This is my point. I find it amazing, that for a 60dB line attenuation, the router is reporting that this type of speed is possible. I really am tempted to request PN to request that BT force regrade my line to 2Mb because I think it could quite easily handle it. Even if it doesn't initially, I can always flash my router to a specialised firmware version which is more in tune for dealing with high attentuation/fast sync rate lines and see if that solves the problem. If it still runs badly, I can pay another 14.99 and ask them to force regrade it back down to 1Mb (which it should be able to manage I would have thought).

I think given the current readings, BT will not bother regrading my line during the mass regrade which is why I am now tempted to just put in a force regrade request.

Any other suggestions welcomed!
Alecto
Grafter
Posts: 2,886
Registered: 30-07-2007

Speed Regrade Advice

I assume that the router figure means that your router can support 3.8 Mb - it's not a measure of what the line will do.

I'd have a go for 1Mb, as at 60 you're on lthe limit, but if your SNR is 20, that's good (13 not so good).

You've nothing to lose - you can always go back to 512 if they do it and you're not stable at that.

I'd be surprised if you got 2Mb though.
There again I was surprised that people voted for Tony Blair, so what do I know

just read your above post - it's not a matter of getting 2Mb all the time, but of your line synching at that and keeping stable. It's no good to you if it keeps dropping connection cos it can't synch reliably at 2Mb. Even with a 2Mb line, you won't get 2Mb all the time - but your line will either synch reliably at 2Mb or it won't. And I'd guess yours won't
Tongue
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Speed Regrade Advice

Quote
I assume that the router figure means that your router can support 3.8 Mb - it's not a measure of what the line will do.


The 3.8Mb varies according to line quality - it is not a static number. I have never ever seen this go below 3Mb. Like I say, I'm tempted to tempt fate and plug a 2Mb forced regrade to see what happens Smiley
Alecto
Grafter
Posts: 2,886
Registered: 30-07-2007

Speed Regrade Advice

Can't wait to hear how you get on.
Cool