Connection dropping
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- Re: Connection dropping
Connection dropping
23-02-2015 10:50 AM
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Hi all,
Recently - since 17th Feb at 0217 (ish!) - I have noticed that my DSL connection has been dropping quite frequently - it was rock solid until then and I have made no changes to wiring or anything. I checked the phone and there was some intermittent crackling which seems to get worse in the evening... However, the DSL drops occur at any time.
Being a relatively new build we don't have a master socket as such - we have an external NTE (which I removed the spiders from yesterday). The first socket connected to the NTE is an ADSL filtered faceplate with the extension socket (1) connected to this so it is pre-filtered.
I changed the router from my Asus N55U back to the Technicolor TG582 but the problem persists. It stayed up for about 12 hours yesterday from 10am - but I noticed it lost connection overnight...
It also seems that sometimes it may not lose sync as the DSL uptime can be longer than the Internet uptime in the Technicolor log...
Any ideas?
Thanks,
Andy
Re: Connection dropping
23-02-2015 12:28 PM
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The crackling on the line is probably going to be the cause of your drops.
Do you still get the crackling if you connect the phone into the filtered faceplate with nothing else connected?
Re: Connection dropping
23-02-2015 1:25 PM
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Thanks Matthew, it looks worse than I thought
I checked a phone in the filter plate - and it was still a little noisy... problem is that it is quite intermittent.
I will test again tonight - and get routerstats running on the PC also...
Thanks again,
Andy
Re: Connection dropping
23-02-2015 7:42 PM
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Do you note any times when the problems are particularly bad? For example, when it's raining, or windy or a time of day?
Re: Connection dropping
24-02-2015 9:23 AM
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It seems worst in the evening (and overnight) - last evening at around 1800hrs was particularly bad. In fact the modem lost sync and did not recover, the broadband was down for about 30 mins until I power cycled to get it back.
We have an external Openreach NTE box as we are a relatively-new-build - however, the first socket (I put in) is an NTE5 with ADSL filter plate, so I could remove the filtered plate and plug a phone into the "test" socket if needed. Obviously, this disconnected my extension and the ADSL modem - and the noise was still present - clicks pops and the occasional tone! I don't have a dongle micro-filter so could not test direct into the test socket - but given the noise was there I suspect this would not have made a great deal of difference.
I plugged everything back and ran routerstats on the PC and watched my downstream margin vary from 10dB down to 0dB (with accompanying line drop) over an hour or so.
Then it settled down for a while. I did the a quiet line test while waking around the house removing plugs - cycling the central heating etc...but could not cause the same noise. I think it is external
Andy
Re: Connection dropping
24-02-2015 9:32 AM
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@Agrajag
Tony will be in at 11 and I can see he has a personnel on this so I will makes sure he carries on with the investigation for you.
Re: Connection dropping
24-02-2015 11:57 AM
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Re: Connection dropping
02-03-2015 9:47 AM
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I have done as much as I think I can do now. I checked the wiring at my first socket and changed the filtered ADSL faceplate from a no-brand to a BT MK3 Interstitial plate and this gave an immediate increase in sync and margin. I was hoping (in vain) that this would increase resilience to the line noise - but sadly over the weekend I had many dropped connections. The margin has now gone up to 14dB and the link has been up for about 1 day and 20 hours...
I have attached a graph of my downstream margin since I installed the new face plate last Thursday...
In terms of an engineer I am wondering how useful this is going to be - obviously as our NTE is outside the property they do not need access so can test the line at any time without us present - but as the noise on the phone is intermittent the likely hood is they'll have a wasted journey as they'll turn up, see/hear/measure nothing and say the line is clean.
I could understand if we lived 7km from the exchange in a village with overhead cables - but this is in a 2011 built estate only 2-3km from the exchange in Milton Keynes... and no, our cabinet is not yet FTTC enabled...
Here are the router stats for anyone interested...
Physical Layer Statistics:
Modem state: up
Up time (Days hh:mm:ss): 1 day, 21:22:06
xDSL Standard: ITU-T G.992.5
xDSL Annex: Annex A
Channel Mode: Interleaved
Number of reset: 1
Chipset Vendor info (G.994.1): Local Remote
Country code: B500 B500
ID: BDCM TSTC
Specific: 0000 0510
System Vendor info (showtime): Local Remote
Country code: 0F00 0000
ID: TMMB ----
Specific: 3C61 0000
Bearers generic info DS US
Payload rate [Kbps]: 5720 272
Attenuation [dB]: 45.0 24.6
Margins [dB]: 14.1 19.1
Output power [dBm]: 20.5 11.8
Number of bearers: 1
Bearer 0 DS US
INP [DMT symbols]: 1.15 0.57
Delay [ms]: 7.87 2.00
Depth []: 32 0.00
R: 14 0
G.997.1 Statistics (Current):
Failures:
Line failures Near end
Loss of signal (LOS): 1
Loss of frame (LOF): 9
Loss of power (LPR): 0
Performance monitoring:
Line PM: Near end
Error second (ES): 168
Channel PM: Near end Far end
Bearer 0:
Code Violation (CV): 564 27
FEC: 51384 92
ATM data path PM: Near end Far end
Bearer 0:
HEC violation count (HEC): 10500 N/A
G.997.1 Statistics (last 15 minutes):
Failures:
Line failures Near end
Loss of signal (LOS): 0
Loss of frame (LOF): 0
Loss of power (LPR): 0
Performance monitoring:
Line PM: Near end
Error second (ES): 3
Channel PM: Near end Far end
Bearer 0:
Code Violation (CV): 564 27
FEC: 51384 92
ATM data path PM: Near end Far end
Bearer 0:
HEC violation count (HEC): 10500 N/A
G.997.1 Statistics (last 24 hours):
Failures:
Line failures Near end
Loss of signal (LOS): 0
Loss of frame (LOF): 0
Loss of power (LPR): 0
Performance monitoring:
Line PM: Near end
Error second (ES): 74
Channel PM: Near end Far end
Bearer 0:
Code Violation (CV): 564 27
FEC: 51384 92
ATM data path PM: Near end Far end
Bearer 0:
HEC violation count (HEC): 10500 N/A
Andy
Re: Connection dropping
03-03-2015 10:52 AM
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Re: Connection dropping
15-04-2015 2:52 PM
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I have a feeling I am still getting line drops - but have switched the router back from the PN one so, at present have less logging available to me - could one of the kindly PN staff please check my disconnection rate please?
Since the issues in February I have updated the wiring to ensure there are no issues on my side of the BT-OR connection... I have still noticed on occasion some intermittent line noise
Thanks,
Andy
Re: Connection dropping
15-04-2015 3:14 PM
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Re: Connection dropping
15-04-2015 3:26 PM
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No, the router was swapped a month or so ago ... I think only one of those drops was deliberate... (i.e. me shifting wires about)
Andy
Re: Connection dropping
16-04-2015 10:32 AM
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Here are your connection logs since Matt last posted, it looks as though we've got another issue with your circuit
<img src="http://community.plus.net/visualradius/generated/image1429175905191.png"/>
Looking at the above logs and the previous actions you have taken internally, I think it might be time to get an engineer to come out to you and complete some further testing. Are there any times in the next few days (likely just weekday availability) that you'd be able to accommodate a visit?
Re: Connection dropping
16-04-2015 3:44 PM
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I am around tomorrow afternoon (Friday 17th) - probably a bit short notice though! - would have to work out our availability for next week...
Andy
Re: Connection dropping
17-04-2015 9:46 AM
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Sorry I'd come off the forum before you replied, I could get someone out tomorrow (8am -1pm or 1pm - 6pm) if you're available?
Cheers
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