Line help needed
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Line help needed
16-12-2014 3:58 PM
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Having a problem with my line.
Up until Saturday I was synced at 8128 but when my line went mental the attenuation jumped from 14 to 44 and the noise margin dropped to -1.8 then router rebooted. When it restarted it had a problem holding a sync I managed to hold a sync after a short time and now I am synced again at 8128, attenuation at 14 and noise at 4.8 and its holding, Since Saturday my throughput is only 2Mb how long do I have to wait for the profile to match the sync or can you do put my line back in training and reset the profile?
Also I just had a new line installed today (Well second activated as already installed) and well I am shocked at the difference between then BT line and PN line, Both lines goes directly to the same exchange (no cabinets as small village exchange), yet the BT synced at 8128 with a noise margin of 10.2 but my PN line only syncs at 7.6 with a noise margin of 6 with an intermittent noise drop to 4.5 or lower on an almost daily basis. This interference is not wiring in the house and I have done an intensive testing around my house switching everything off except the router and laptop when it drops and its still there, so the interference is outside somewhere between me and the exchange. Any way we can get the interference on my PN line investigated.
I was going to open a ticket but PN seems to have stopped me doing that.
Regards
Re: Line help needed
16-12-2014 4:00 PM
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Quote Up until Saturday I was synced at 8128 but when my line went mental the attenuation jumped from 14 to 44 and the noise margin dropped to -1.8 then router rebooted.
Do you know what caused this?
&
Quote now I am synced again at 8128, attenuation at 14 and noise at 4.8 and its holding,
Quote my PN line only syncs at 7.6 with a noise margin of 6
Are both of these statements about the Plusnet line?
I'll go run a line test and see what's going on.
Re: Line help needed
16-12-2014 4:04 PM
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Your line is synced at 8128 now, which means the profile should increase to 7150, however as the increase is only around 9% (from 6500 to 7150) the profile change can take 96 hours on 20CN lines.
Re: Line help needed
16-12-2014 4:17 PM
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Quote Your line is synced at 8128 now, which means the profile should increase to 7150, however as the increase is only around 9% (from 6500 to 7150) the profile change can take 96 hours on 20CN lines.
As for the line now, my throughput is only 1.8Mb so this means the profile is 2000. That is what the PN current line speed says I am.
Re: Line help needed
16-12-2014 4:32 PM
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You might need to log in to your router and disconnect/reconnect before you see an increase in speed.
Re: Line help needed
16-12-2014 4:38 PM
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Any ideas about the noise on the line or how to clear the line to improve quality a bit.
Re: Line help needed
16-12-2014 4:58 PM
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I've just performed a line test on the phone line itself which isn't showing any issues either.
With the attenuation of 14, I'd expect your line to be syncing at the full 8128 even at a 6db target.
Could you try a resync, during daylight hours after you've removed the tweaks and see what the line connects at then?
Re: Line help needed
16-12-2014 7:14 PM
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Quote With the attenuation of 14, I'd expect your line to be syncing at the full 8128 even at a 6db target.
This is what I would expect. The new line is doing this.
I will remove the tweak and re sync tomorrow and post the results.
Re: Line help needed
17-12-2014 1:31 PM
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Stats:
Quote Max: Upstream rate = 1064 Kbps, Downstream rate = 8340 Kbps
Channel: FAST, Upstream rate = 448 Kbps, Downstream rate = 7712 Kbps
Link Power State: L0
Mode: G.DMT
TPS-TC: ATM Mode
Trellis: ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.1 23.0
Attn(dB): 14.0 7.0
I uploaded what I monitored last night. Forget the first big drop, that was me but the one near the end. Last night was a small drop and did not last long but it happens at different times and can last hours. I also checked the other line at the same time as this drop and the other line was not affected.
Re: Line help needed
17-12-2014 5:02 PM
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Quote from: rackstraw2006
Quote Max: Upstream rate = 1064 Kbps, Downstream rate = 8340 Kbps
Is this a 20CN or 21CN line? See here - http://www.kitz.co.uk/adsl/adslchecker.php - for what is available.
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Re: Line help needed
17-12-2014 5:10 PM
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Quote Distance:
Direct: 602 metres (appx)
By Road: 0.8 km
Status
ADSL enabled: April 6, 2005
DSL Max enabled: March 31, 2006
21CN WBC (Broadband) Not available
21CN due : (PSTN) info N/A
FTTC Not available
SDSL enabled : Not Enabled
Fixed ADSL: 2048 kbps (2 Mb)
DSL Max: 8000 kbps (8 Mb)
21CN WBC : Not Available
Re: Line help needed
18-12-2014 6:18 PM
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Re: Line help needed
18-12-2014 6:23 PM
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What is the sample interval? Every 10 seconds would be useful.
The "dark hours" SNRM transition looks absent, which is good news.
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Re: Line help needed
18-12-2014 7:24 PM
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I have been at this for months now and had everything unplugged and its still there. Now I can eliminate some things close to me. My phone line goes out my back garden across the next door garden to the poll in the field behind my house. This is the same route my other line takes. As the other line is not affected then the problem I would think would be further away and as its not close, I have no way of tracing it as I am not sure the route the line takes after the next poll as it goes underground.
Since I got my other line I have a question I was wondering about. Is it possible to get BT to climb the poll out my back and disconnect it from the dodgy line and move it to another one.
Re: Line help needed
18-12-2014 7:54 PM
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I guess it out to be possible to get BTOR to swap the d&e-side pairs between the two lines... but how is a different matter!
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