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    Are connection drops normal?

    This is a discussion on Are connection drops normal? within the Sky Broadband help forums, part of the Sky Broadband help and support category; Morning all, I've just switch over from Plus.net to Sky Unlimited (switch took place yesterday afternoon) which has taken me ...

    1. #1
      redoctober's Avatar
      redoctober is offline Sky User Member
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      Question Are connection drops normal?

      Morning all,

      I've just switch over from Plus.net to Sky Unlimited (switch took place yesterday afternoon) which has taken me from a 8000ish sync with the exchange to, initially 4900 kbps and as of 02:30 this morning 14547 kbps.

      System Up Time: 48:38:39

      Port Status TxPkts RxPkts Collisions Tx B/s Rx B/s Up Time
      WAN PPPoA 89944 120957 0 2874 5148 05:59:10
      LAN 1262555 601646 0 10923 240 48:38:39
      WLAN 104492 91856 0 10012 1616 02:30:20
      ADSL Link Downstream Upstream
      Connection Speed 14547 kbps 945 kbps
      Line Attenuation 29.0db 17.3db
      Noise Margin 7.4db 14.8db

      My question is... I left the router plugged in when I left for work yesterday morning. When physical change took place at the exchange the connection dropped about 3 times before it stableised. The bit I'm worried about though is that it dropped again at around 02:30 this morning (same time as the re-sync took place giving me the sync speed of 14547).

      Does the connection normally drop when a sync-speed change takes place?

      My concern is that around 2 weeks ago during high winds the bracket securing drop from pole in the street to my house broke and the line was sagging about 4ft into the street, causing a massive amount of noise on the line and my connection to drop down to the minimum speed you get with DLM.

      This fault has since been fixed. However in the two weeks since the incident I did suffer quite a few random disconnections whilst still with plus.net, although for the last 3 days of service with them it was stable. I dont know if this is normal after a fault. I work for Virgin Media and I know our cable modem customers get punted offline (or atleast used to in the early days) and have to resync with their DHCP server to obtain their new conection speed, I dont know if ADSL works the same way. More worrying is that it happened again this morning now that i'm moved over to sky.

      Hope all this makes sense

      Cheers guys.


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    3. #2
      IWasNotTheEnemy's Avatar
      IWasNotTheEnemy is offline Sky User Member
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      Re: Are connection drops normal?

      Dropping early in the morning is completely normal as this is when DLM resyncs the line - nothing to worry about
      -------------------------------------------



      Useful Sticky: - How To Obtain Your Router Stats, BT Speed Test, Check For Test Socket

    4. #3
      redoctober's Avatar
      redoctober is offline Sky User Member
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      Re: Are connection drops normal?

      Thanks for the reply.

      Just out of curiousity, whats sort of SNR margin am I likely to start seeing problems at?

      It's currently showing:

      System Up Time: 58:00:59

      Port Status TxPkts RxPkts Collisions Tx B/s Rx B/s Up Time
      WAN PPPoA 0 0 0 0 0 15:21:31
      LAN 1263117 601648 9158 201 58:00:60
      WLAN 104492 91856 0 10012 1616 02:30:20
      ADSL Link Downstream Upstream
      Connection Speed 14547 kbps 945 kbps
      Line Attenuation 29.0db 17.3db
      Noise Margin 6.5db 15.0db

      I've read that it tries to maintain an SNR margin of 6.9, so what happens if it goes below this?

      Thanks again.

    5. #4
      redoctober's Avatar
      redoctober is offline Sky User Member
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      Re: Are connection drops normal?

      Oh and for some reason its stopped logging stats on the PPPoA interface?

    6. #5
      simon194's Avatar
      simon194 is offline Sky User Member
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      Re: Are connection drops normal?

      Quote Originally Posted by redoctober View Post
      I've read that it tries to maintain an SNR margin of 6.9, so what happens if it goes below this?
      The SNR on my line can drop as low as 4.5dB at night and I don't any appreciable drop in download speed and no disconnection problems either.

      It's one of the joys of living in an area with overhead phone lines because the street lights induce quite a bit of high frequency noise on the line when they are on at night.

     

     

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