SNR = Expert comments please.Do I have a rubbish line?
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SNR = Expert comments please.Do I have a rubbish line?
21-06-2010 8:15 PM
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My line has been flakey for a year or more now with the odd unexplained complete disappearance from broadband thrown in for free.It got fixed by BT at the exchange but was never explained to me.
So I've been digging (thanks to oldjim for the program).This is my connection for the last three days or so.The vertical lines are logs of a connection break of at least 1 minute.The snr just looks horrific to me,but I don't really know what I'm looking at.Is this as bad as it seems/feels/appears?
I include speedtests conducted over the last three weeks.You can safely ignore the big V,which was a speedtest performed just as the connection dropped.
I have a rock solid D/S attenuation of 38db and am around 3klicks from the exchange by wire.I was expecting a bit more than 2.7 megs actual.Is this my line just being rubbish?
Appreciate any comments.
Re: SNR = Expert comments please.Do I have a rubbish line?
21-06-2010 9:18 PM
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Also post the stats when in the test socket
Re: SNR = Expert comments please.Do I have a rubbish line?
21-06-2010 9:56 PM
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I'll hook it up to what passes as the main socket ( it's the only one,where the telephone (dect) is connected and see what happens.
Re: SNR = Expert comments please.Do I have a rubbish line?
22-06-2010 10:52 PM
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Hooked up to the main socket and using wireless for access.
Graph so far looks a bit different but still very high.A few breaks showing but not in the log.
Re: SNR = Expert comments please.Do I have a rubbish line?
22-06-2010 11:45 PM
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Quote from: jagger 'll hook it up to what passes as the main socket ( it's the only one,where the telephone (dect) is connected and see what happens.
Sorry for double checking the obvious, but was the DECT telephone plugged in using a filter?
jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: SNR = Expert comments please.Do I have a rubbish line?
23-06-2010 12:52 AM
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Re: SNR = Expert comments please.Do I have a rubbish line?
23-06-2010 8:48 PM
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The results look a lot better - you haven't got the big drop over night
Re: SNR = Expert comments please.Do I have a rubbish line?
23-06-2010 11:11 PM
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Seems to happen around 8 o'clock.Can't think of any household systems that are active at the time.
I do live next door to a small housing estate sized electrickery substation but I can't see that dropping off in performance at prime time and hence be having some effect.
Is an snr reading that high (hovering around 16 this morning) necessarily a bad thing Jim?
Re: SNR = Expert comments please.Do I have a rubbish line?
24-06-2010 10:02 AM
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Going back to your first graph you were seeing a drop of margin from about 15dB to about 10/11dB
The new graph shows a drop of rather less than that but we need a full overnight result to compare however the graph in your reply 3 seems to be overnight and shows no dip.
Can you confirm that this graph is from what is the nearest thing you have to a master socket and is the last graph from the same socket
Re: SNR = Expert comments please.Do I have a rubbish line?
24-06-2010 11:00 AM
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My line improved a lot after I had the bell wire snipped. (My wiring is a bit complicated so I got someone in who knew what he was doing, but if your wiring is more standard you can probably do it yourself. See http://www.kitz.co.uk/adsl/socket.htm)
I still have SNR drops at night, but my line can now sustain a sync speed of about 8mb/s (admittedly, this is on ADSL2+) and my IP profile is either 7000 or 7150.
Re: SNR = Expert comments please.Do I have a rubbish line?
24-06-2010 11:09 AM
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The graph in reply 3 is the main socket, and overnight, just after I'd moved the router from upstairs.
The continuation of graph in last post is below.This is current @11:05 this morning
Thanks Graham.I'll bear that in mind (not going to start snipping yet though.
Re: SNR = Expert comments please.Do I have a rubbish line?
24-06-2010 12:38 PM
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i would also suggest removing the bell wire
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