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    d link. constant disconnections. please help!

    This is a discussion on d link. constant disconnections. please help! within the Sky Broadband help forums, part of the Sky Broadband help and support category; I have a huge problem with the noise margin and losing connection every 5-10 minutes. The noise margin seems to ...

    1. #1
      zachary's Avatar
      zachary is offline Sky User Member
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      d link. constant disconnections. please help!

      I have a huge problem with the noise margin and losing connection every 5-10 minutes. The noise margin seems to drop and drop on the download side, down from 7-8db to 3db, then 0.-8db or some similar reading while the upload shoots up to 100db. I know it suggests a line fault obviously and we're through to the tier 3 waiting on a 72 hour call back but i'm curious to see if anybody else has experienced this or might know the cause.

      It literally started one morning and has got progressively worse. To begin with you could stay connected for half hour to a hour but today it's literally dropping every 2-5 minutes. Also the connection type is switching between MER and PPPoA with the VCI changing from 40 to 38 naturally. Disconnects on MER, starts on PPPoa or vice versa. When online the connection is decent, 10-15mbs download speeds and a stable'ish 40-50 ms ping. I'd have thought with a line fault the pings and speeds would be all over the place if you could connect?

      Also rather than getting a straight 404 cant' connect or timed out warning or whatever i'm getting that blank pink webpage with the 404 error which I've never had before with a micro httpd link under it. From the computer side it never says it actually drops connection which is weird.

      I've tried everything. Changing the filters, removing the phone line, sky box, resetting the router, moving it back and fowards between the test socket and other phone points, connecting wirelessly or via ethernet, stuff even I know wouldn't make a difference. Exactly the same problem. The phone line is pretty crackled but decent and it's always been that way.

      Any ideas?

      Stats
      ADSL Link Downstream Upstream
      Connection Speed 16383 kbps 945 kbps
      Line Attenuation 16.0db 9.7db
      Noise Margin db 6.5db

      Yes, it had no downstream noise margin, but this changes every 2 minutes so yeah. Attenuation is great though, I live basically next door to the exchange. Heres some logs.

      Aug 11 17:01:43 kernel: Line 0: xDSL G.994 training
      Aug 11 17:01:59 kernel: Line 0: ADSL G.992 started
      Aug 11 17:02:03 kernel: Line 0: ADSL G.992 channel analysis
      Aug 11 17:02:07 kernel: Line 0: ADSL G.992 message exchange
      Aug 11 17:02:08 kernel: Line 0: ADSL link up, Path 0, us=945, ds=16383
      Aug 11 17:02:14 syslog: PPP LCP UP.
      Aug 11 17:02:14 syslog: Received valid IP address from server. Connection UP.
      Aug 11 17:02:43 kernel: Line 0: ADSL link down
      Aug 11 17:02:45 syslog: Clear IP addresses. Connection DOWN.
      Aug 11 17:02:45 syslog: Clear IP addresses. PPP connection DOWN.
      Aug 11 17:02:45 kernel: Line 0: xDSL G.994 training
      Aug 11 17:03:00 kernel: Line 0: ADSL G.992 started
      Aug 11 17:03:04 kernel: Line 0: ADSL G.992 channel analysis
      Aug 11 17:03:09 kernel: Line 0: ADSL link down
      Aug 11 17:03:11 kernel: Line 0: xDSL G.994 training
      Aug 11 17:03:26 kernel: Line 0: ADSL G.992 started
      Aug 11 17:03:30 kernel: Line 0: ADSL G.992 channel analysis
      Aug 11 17:03:35 kernel: Line 0: ADSL G.992 message exchange
      Aug 11 17:03:36 kernel: Line 0: ADSL link up, Path 0, us=945, ds=16383
      Aug 11 17:04:03 kernel: Line 0: ADSL link down
      Aug 11 17:04:04 kernel: Line 0: xDSL G.994 training
      Aug 11 17:04:19 kernel: Line 0: ADSL G.992 started
      Aug 11 17:04:25 kernel: Line 0: ADSL G.992 channel analysis
      Aug 11 17:04:29 kernel: Line 0: ADSL G.992 message exchange
      Aug 11 17:04:30 kernel: Line 0: ADSL link down
      Aug 11 17:04:31 kernel: Line 0: xDSL G.994 training
      Aug 11 17:04:46 kernel: Line 0: ADSL G.992 started
      Aug 11 17:04:51 kernel: Line 0: ADSL G.992 channel analysis
      Aug 11 17:04:55 kernel: Line 0: ADSL G.992 message exchange
      Aug 11 17:04:55 kernel: Line 0: ADSL link up, Path 0, us=945, ds=16383
      Aug 11 17:05:09 kernel: Intrusion -> IN=atm1 OUT= MAC=5c:d9:98:0c:0d:3b:00:07:72:be:7a:4c:08:00 SRC=109.148.49.174 DST=94.13.198.166 LEN=52 TOS=0x00 PREC=0x00 TTL=116 ID=4490 DF PROTO=TCP SPT=49576 DPT=50000 WINDOW=8192 RES=0x00 SY
      Aug 11 17:05:12 kernel: Intrusion -> IN=atm1 OUT= MAC=5c:d9:98:0c:0d:3b:00:07:72:be:7a:4c:08:00 SRC=109.148.49.174 DST=94.13.198.166 LEN=52 TOS=0x00 PREC=0x00 TTL=116 ID=4569 DF PROTO=TCP SPT=49576 DPT=50000 WINDOW=8192 RES=0x00 SY
      Aug 11 17:05:25 kernel: Line 0: ADSL link down
      Aug 11 17:05:27 kernel: Line 0: xDSL G.994 training
      Aug 11 17:05:43 kernel: Line 0: ADSL G.992 started
      Aug 11 17:05:47 kernel: Line 0: ADSL G.992 channel analysis
      Aug 11 17:05:51 kernel: Line 0: ADSL G.992 message exchange
      Aug 11 17:05:52 kernel: Line 0: ADSL link down
      Aug 11 17:05:53 kernel: Line 0: xDSL G.994 training
      Aug 11 17:06:09 kernel: Line 0: ADSL G.992 started
      Aug 11 17:06:13 kernel: Line 0: ADSL G.992 channel analysis
      Aug 11 17:06:17 kernel: Line 0: ADSL G.992 message exchange
      Aug 11 17:06:18 kernel: Line 0: ADSL link down
      Aug 11 17:06:19 kernel: Line 0: xDSL G.994 training
      Aug 11 17:06:35 kernel: Line 0: ADSL G.992 started
      Aug 11 17:06:39 kernel: Line 0: ADSL G.992 channel analysis
      Aug 11 17:06:43 kernel: Line 0: ADSL G.992 message exchange
      Aug 11 17:06:44 kernel: Line 0: ADSL link up, Path 0, us=945, ds=16383
      Aug 11 17:07:04 kernel: Line 0: ADSL link down
      Aug 11 17:07:05 kernel: Line 0: xDSL G.994 training
      Aug 11 17:07:21 kernel: Line 0: ADSL G.992 started
      Aug 11 17:07:25 kernel: Line 0: ADSL G.992 channel analysis
      Aug 11 17:07:29 kernel: Line 0: ADSL G.992 message exchange
      Aug 11 17:07:30 kernel: Line 0: ADSL link down

      Help!!


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    3. #2
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      Re: d link. constant disconnections. please help!

      Something is causing your router to loose it's connection. The issue of it swapping between PPPoA & MER is to do with Sky pushing MER and essentially the Sky routers seem to initially connect via PPPoA, find that they can connect via MER, disconnect & reconnect with MER.

      Due to the disconnections your router is going through this process over and over again.

      PPPoA settings are for VCI=38, whilst MER has VCI set to 40.

      So now you understand why you router is struggling after each disconnection, let's concentrate on what is causing it.

      Firstly, can you connect your router to the Test Socket. This will rule out any internal wiring that may be causing you problems.

      Use only the short grey ADSL lead supplied by Sky with your router and a suitable microfilter.

      Could you next do a quiet line test. To do this you will need to plug a corded telephone into the test socket, dial '1', and listen carefully for any noise. You are listening for any hiss or crackling.

      Try this test with & without the router connected.

      If there is a noise without the router connected, then call your line provider. They need to engage BT Openreach to repair your line.

      If there is only noise with the router connected, then try another microfilter.

      Sky Fibre Unlimited Pro: Connected at 80,000 kbps / 20,000 kbps
      Previous ADSL2+ Speed 19999 kbps 1153 kbps, Line Attenuation 17.5 db 6.9 db, Noise Margin 7.5 dB 8.7 dB
      Speedtest: 17.15MB/s 0.97Mb/s Ping 31 ms

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    5. #3
      Tonka's Avatar
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      Re: d link. constant disconnections. please help!

      I posted this in another thread - Sky Broadband Unlimited, Strange disconnection problems need help!, but this one seems more relevant as i am having similar problems.

      Hope you don't mind me copy and pasting it here.

      HI all, and apologies for the slight necro post!

      I am having problems with disconnects at the moment and am due an engineer visit on monday.

      I am now using the Dlink router, i also have the SagemCom router here, both have exhibited the problem.

      I have noticed that i have been stuck on the same ip since these problems began, while my ip was dynamic before. Sometimes, when the router is trying to connect again, it chooses to connect to PPPoa, fails, then connects to the MER network thingy as usual.

      My question is, what should i be connecting to, PPPoa or MER? It was always MER before the problems began.

      I'm just trying to gather as much info as possible to give to sky to get this fixed, its doing my head in now!

      Stats;
      Connection Speed 13768 kbps 945 kbps
      Line Attenuation 14.5db 9.1db
      Noise Margin 6.9db 5.0db

      Thanks in advance for any assistance.

    6. #4
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      Re: d link. constant disconnections. please help!

      Quote Originally Posted by zachary View Post
      The phone line is pretty crackled but decent and it's always been that way.
      If you have any crackling with a corded phone plugged into your test socket you need to contact your phone service provider to get it fixed.
      Don't mention broadband.
      There should be no noise on the line.

      Get that fixed and you might well find your broadband works correctly.

      Andy

    7. #5
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      Re: d link. constant disconnections. please help!

      Thanks all.

      And it's a wireless phone, we don't have any corded ones. It's not extremely bad, sometimes it's completely silent (during the quiet test) other times it's a very slight but noticeable white noise/crackling. I've tested 3 different filters, 2 are brand new (from friends who only needed one from sky), all the same.

      Quick update. I noticed when somebody was on the phone yesterday for about 5 minutes after the internet worked perfectly. After you mentioning the line test I tried it out and as soon as I started it the router started showing internet access. So we checked it, it worked for a lil, then died. I pretty much tested the line over and over for 5 minutes, it worked for half a hour on two seperate occasions. Weird right?

      So then just as a test we pretty much repeatedly tested the line for 10 minutes, and I faffed around finding the distance from the exchange and stuff with the 17070 number, hung up. Internet has been working flawlessly ever since midnight last night after not connecting for more than 30 seconds before all day long.

      Causes?

    8. #6
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      Re: d link. constant disconnections. please help!

      Quote Originally Posted by zachary View Post
      other times it's a very slight but noticeable white noise/crackling.
      You need to get this sorted. As suggested, you're going to have to test it from the test socket with a, preferably, corded phone and no other equipment at the test socket (just the phone itself, no filters etc.). If you still near noise from there, then call your line rental provider and report the fault.

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    10. #7
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      Re: d link. constant disconnections. please help!

      Will do mate, thank you! I'm sure it might just be the wireless phone though, even without dialing anything there's noise.

      Any ideas why it's back on flawlessly for me now? If it's a fault, surely it's just not gonna work or if it does it's gonna be terrible to browse on. I'm downloading a game from steam at 1.7mb/s, browsing the internet/youtube, with a 50ms ping. Not to shabby for a line with a alleged fault?

      I'm convinced the landline had something to do with it. Too much of a coincidence to work after abusing the line test and stuff last night after not wanting to know for more than 30 secs two days straight.

      Stats as of now. With a UP time of over 14 hours.

      Downstream Upstream
      Connection Speed 16383 kbps 945 kbps
      Line Attenuation 15.0db 8.9db
      Noise Margin 9.6db 5.2db

      On the phone they said our line should support 21000kbps with some adjustment (i'm basically next to the exchange)

    11. #8
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      Re: d link. constant disconnections. please help!

      Not all line faults are permanent, especially noisy faults. It's highly possible that it's an intermittent fault. Even if you find it is something to do with the phone itself, at least you'll have tested it as it's something that CST need to check when they call back, as they'd need to know which type of Openreach engineer to log.

    12. #9
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      Re: d link. constant disconnections. please help!

      If it's a fault, surely it's just not gonna work or if it does it's gonna be terrible to browse on
      Not necessarily, their are all types of faults, yours may be a high resistance fault which is basically a loose joint, which 'closes up' when you use the phone and so improves the broadband. At times it will be OK then it will suddenly open again and drop your connection. If you drop again, bring up the router stats and then make a phone call, if your noise margin shoots up and you reconnect, this will confirm this type of fault. You should push to get the line properly checked by a BTO engineer. The line may show as OK when Sky check it, but it is definitely not.

      TomD


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