ADSL Exchange and Line Checker Question
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ADSL Exchange and Line Checker Question
07-03-2009 5:42 PM
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It estimates a Fixed ADSL Line Speed to be 1024kbps and DSL Max to be 3000kbps.
1) I understand these are only estimated figures based on distance from the exchange (2.29km direct, 3.86km by road) but my mother has had a fixed 2M stable connection for almost 5 years initially with PN and now with Sky. Does this mean that when I take the new line and have Max enabled I could expect speeds to be substantially higher than the estimated 3000kbps?
2) It states that the exchange will be 21CN enabled on 30/3/09 which is good news as it's the day before my line/BB is due to be activated but there is no estimated speed. I checked a few other telephone numbers/post code combinations I know and, whether or not the exchange had been 21CN enabled, there was never an estimated speed shown. Any clue as to why this is?
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Re: ADSL Exchange and Line Checker Question
07-03-2009 6:00 PM
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Distance:- Direct: 4.07 km
(appx)* By Road: 4.99 km
and I have a stable sync of 3776kbps
Re: ADSL Exchange and Line Checker Question
07-03-2009 6:02 PM
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That's not so bad.. really for Max. I just think I've been spoilt over the last three years with the exchange just yards away
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Re: ADSL Exchange and Line Checker Question
07-03-2009 6:03 PM
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Re: ADSL Exchange and Line Checker Question
07-03-2009 6:15 PM
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Can I assume that the attenuation for my new line is going to be the same as the existing one or can there be great differences due to new cabling, etc? My parent's house was built 8 years ago.
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Courage is resistance to fear, mastery of fear, not absence of fear - Mark Twain
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Re: ADSL Exchange and Line Checker Question
07-03-2009 6:37 PM
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Unless of course you get one that was rejected by another customer because of ADSL problems
Re: ADSL Exchange and Line Checker Question
07-03-2009 6:52 PM
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The fella I spoke to when I ordered the new line informed me that, as I was having BB on it and my parent's already have BB on their line a new cable would have to be run into the house.
You answer seems to indicate that they would use the existing wiring?
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Courage is resistance to fear, mastery of fear, not absence of fear - Mark Twain
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Re: ADSL Exchange and Line Checker Question
07-03-2009 7:03 PM
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Re: ADSL Exchange and Line Checker Question
07-03-2009 7:05 PM
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It might be the pole where the other connection comes from or if there isn't one there the nearest green box to your house
Re: ADSL Exchange and Line Checker Question
08-03-2009 2:03 AM
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Based on information from Kitz's checker, the attenuation for a 3.86km line is likely to be 50-55dB (Oldjim's line is either a good one or doesn't follow the road). Speed on maxDSL might reach 4000kbps, 4200kbps on 21CN. However the stepping of IP Profiles would give the same 3500kbps profile in both cases.
Re: ADSL Exchange and Line Checker Question
08-03-2009 2:19 PM
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I misunderstood what Jim said. A new cable will be pulled from the green box to my parents' house which is what I expected. When Jim said they won't run a new line I now assume he meant not from the exchange rather than from the green box.
If I can get around 4000kbps on ADSL2 then that's not as bad as a fixed 2M - hopefully it will be stable.
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Courage is resistance to fear, mastery of fear, not absence of fear - Mark Twain
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Re: ADSL Exchange and Line Checker Question
09-03-2009 10:48 AM
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How would interleaving on or off affect the new line and would it remain stable?
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Re: ADSL Exchange and Line Checker Question
09-03-2009 10:57 AM
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Deleted - thanks "Fork Handles" I forgot about the fixed line.
Given the attenuation and with a fair wind you should get over 4500kbps even with a 9dB noise margin
The new line will have interleaving enabled by default which is no problem unless you are into gaming. If you need low pings then it is just possible the default noise margin will rise to 12dB which will still give reasonable speeds.
All you can do is wait until you are connected then monitor the corrected errors. If they are low then taking off interleaving would be no problem. If they are high you may have to forgo speed for low pings
Re: ADSL Exchange and Line Checker Question
09-03-2009 11:09 AM
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Quote from: Mav Checked my parents' connection last night and they have Att of 49 with Noise Margin of 19. My current Att is 5 and NM is 12.5.
Quote from: Oldjim That actually is worrying as it would tend to indicate a noisy line (default noise margin of 15dB)
But isn't that on the existing 2Mb fixed line?
Zen FTTC 40/10 + Digital Voice FRITZ!Box 7530
BT technician (Retired)
Re: ADSL Exchange and Line Checker Question
09-03-2009 11:12 AM
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Quote from: Oldjim That actually is worrying as it would tend to indicate a noisy line (default noise margin of 15dB)
Perhaps the new line will be slightly better?
I don't do gaming so low pings are not that important. Pings on my current line tend to be in the low 40s - will have to wait and see what I will get.
Quote from: 4Candles But isn't that on the existing 2Mb fixed line?
Yes - would the Att and noise Margin be different, then for MaxDSL? If so, I never knew that. I just assumed that a fixed line was, possibly, better and more stable because of those figues
Thanks for your help
Forum Moderator and Customer
Courage is resistance to fear, mastery of fear, not absence of fear - Mark Twain
He who feared he would not succeed sat still
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