Line Length Problem
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- Re: Line Length Problem
Line Length Problem
30-03-2013 11:33 AM
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BT now saying that I have 'excessive' line length, specifically that tests show that its between 350 and 600 m from the DP (note NOT the PCP) to my Socket when I know that the pole is outside my house and its a total of 32m !!! Their estimates of the exchange to PCP length and the PCP to the DP length (600m) are about right.
I can't seem to get them to understand - any thoughts on a theory of whats going on ?
Thanks
Re: Line Length Problem
30-03-2013 1:31 PM
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If the distances you've quoited are correct, then 18Mbps for a 600m line is poor. That would suggest you are on poor quality cable - or it's a faulty pair. What exactly have these 6 "engineers" done?
Re: Line Length Problem
30-03-2013 6:20 PM
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http://forums.thinkbroadband.com/fibre/4226012-line-length-issue.html?view=collapsed
Re: Line Length Problem
30-03-2013 6:46 PM
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This is an extract from a BT Email (my comments in ITALICS)
Line loss calculator shows:-
exchange to PCP 9 1882 metres (correct)
PCP 9 to dp411 596 metres (correct and DP 411 is the pole outside my house - total of 32m from the Master Socket)
line test 2.85km
Suggests DP to EU 372 meters of unpredicted line length.
Another test system shows Estimated length 1212m PCP to EU also confirming the line is longer than estimated.
Possibly 616 metres DP to EU.
Engineer visit have included removing Filters, changing external wire outside house (but not all of it), approx 4 hours between PCP/exchange/house (x2) and changing router/Plusnet Box.
Re: Line Length Problem
30-03-2013 10:13 PM
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So there is faulty cable somewhere between the Cab and the DP or the bit they didn't change.
Keep moaning.
Re: Line Length Problem
30-03-2013 10:50 PM
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Quote from: mikez Estimated was 32 and I got 37 on the first day - progressively drops to around 16 -18.
If the 37mbps was the speed reported in your member centre then it may be wrong.
When I first got PN fibre, my member centre showed a current line speed of 37 mbps. This was incorrect the actual sync speed was 23mbps.
When I questioned PN about this I got this answer:
Quote "The 37Mb/s sync speed is what we set your line profile when your connection went active until we determined the actual speed of your line, if you check again it is now at 23.8Mb/s "
http://community.plus.net/forum/index.php/topic,111808.msg958504.html#msg958504
Re: Line Length Problem
31-03-2013 8:57 AM
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Re: Line Length Problem
31-03-2013 9:39 AM
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Re: Line Length Problem
31-03-2013 10:28 AM
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Yes he may be talking about speed tests, but I think this point is worth checking. I mention this incase, if like me, he fell into the trap of plusnets incorrectly reported initial figure.
Some posts are assuming the line has deteriorated from 37mbps, if the OP is quoting PN's incorrect initial line speed then the line may not have deteriorated but started off with poor speeds -- this I think is very significant.
Re: Line Length Problem
31-03-2013 11:32 AM
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The default values IIRC are 37Mbps for 40/10 FTTC, 78MBps for 80/20 FTTC, 21Mbps for 21CN and I think 7.15Mbps for 20CN. A few years back it used to be 2Mbps for ADSL as the BT IP profile was set at that value by BT's systems for 2 days but this unfairly restricted speeds for people with faster connections.
All this can, as you point out, cause confusion, but a lot of people don't check the Current Line speed as they may not be aware of it. The correct thing to do is run the BTw Performance test (ignore the red preamble except make sure no other programs are using the Internet) and at the end of the first run, click the Further Diagnostics button, enter just your Phone number and Run the Further Diagnostics Test - which will show the BT IP Profile for the Line + the sync speeds on ADSL.
However, none of this has any significance to the poor performance of mikez's line whatever the initial speed actually was.
Re: Line Length Problem
01-04-2013 11:53 AM
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BTW the initial speed I quoted wasn't an estimate but what I got on my laptop (and the BT Engs laptop) on the day of installation
Thanks to all
Re: Line Length Problem
01-04-2013 10:50 PM
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Quote from: mikez
BTW the initial speed I quoted wasn't an estimate but what I got on my laptop (and the BT Engs laptop) on the day of installation
Thanks to all
That's reassuring, the fact the line was initially capable of higher speed gives ammunition for your case with BT.
Re: Line Length Problem
03-04-2013 10:29 AM
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