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    Sync speed lower since stale session

    This is a discussion on Sync speed lower since stale session within the Sky Broadband help forums, part of the Sky Broadband help and support category; I lost connection on Thursday following a reboot. I took two days to finally contact tier three support who fixed ...

    1. #1
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      Sync speed lower since stale session

      I lost connection on Thursday following a reboot. I took two days to finally contact tier three support who fixed it in 30 seconds. However, after I'd reported it to tier one but before tier three even looked at it, when I rebooted the router trying to get a connection, it started to sync at 6880 down and 288 up. It won't sync higher than this now (in fact it ONLY syncs at this speed now). Before the problem I was getting over 8000 down and 416 up. Is there anything tier one could have done to cause this? I'm on mid with an attenuation of 37 and an SNR around 12.0.


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    3. #2
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      Re: Sync speed lower since stale session

      As seems to be very common, you contact Sky about a connection problem and you end up getting capped. It looks as though that's what's happened in your case.

      You'll need to get through to T3 again to get uncapped, or at least, find out why if they won't uncap you. En route to T3, ignore it if T1 tell you "that's all your line can take". They're just reading from their screen and following what they've been told to say. T1 can neither cap you or uncap you.

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      Re: Sync speed lower since stale session

      Thanks Saturday. However, I believe this happened before tier 3 even looked at the problem. I waited until 2am this morning to phone them so I could be sure of talking to tier 3. The guy I spoke to on tier 1 said no one had updated my notes yet so I assumed it hadn't been looked at. I noticed the drop in sync speed on Thursday night when I was trying to sort out the problem. That was about 30 hours before tier 3 were involved.
      Last edited by Saturday; 10-11-07 at 06:22 PM. Reason: Removed full quote of preceding post

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      Re: Sync speed lower since stale session

      Well without seeing your full stats, what you describe certainly sounds like you've been capped e.g. same sync after every boot and a higher than default noise margin.

      Only T3 can cap, however, contact with T1 can be enough to trigger what I believe Sky call "auto profiling" or something like that. Basically it appears to be some sort of automated process. One very common effect of this process is that unlike manual capping which is usually only done to the downstream sync, the auto thing also affects the upstream sync. Your upstream also sounds like it is capped.

      There's no 100% way to test for a cap though what I described above is a strong indicator. An added thing to look at would be your max rate as shown in your detailed router stats. If that is significantly higher than your actual rate then that makes it almost certain you've been capped.

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      Re: Sync speed lower since stale session

      That will be very annoying and totally unjustified just for a stale session!!!
      These are my stats although only for a short period:

      /usr/sbin/adslctl: ADSL driver and PHY status
      Status: ShowtimeRetrain Reason: 0
      Channel: INTR, Upstream rate = 288 Kbps, Downstream rate = 6880 Kbps
      Link Power State: L0
      Mode: G.DMT
      Channel: Interleave
      Trellis: ON
      Line Status: No Defect
      Training Status: Showtime
      Down Up
      SNR (dB): 11.1 13.0
      Attn(dB): 37.0 22.5
      Pwr(dBm): 19.8 0.8
      Max(Kbps): 9120 1184
      Rate (Kbps): 6880 288
      G.dmt framing
      K: 216(0) 10
      R: 16 16
      S: 1 16
      D: 64 8
      ADSL2 framing
      MSGc: 1 1
      B: 216 10
      M: 1 16
      T: 1 1
      R: 16 16
      S: 1.0737 17.4545
      L: 1736 88
      D: 64 8
      Counters
      SF: 163133 163137
      SFErr: 4 0
      RS: 11093110 692830
      RSCorr: 1198 0
      RSUnCorr: 65 0

      HEC: 3 0
      OCD: 0 0
      LCD: 0 0
      Total Cells: 45000866 0
      Data Cells: 1160299 0
      Drop Cells: 0
      Bit Errors: 0 0

      ES: 3 0
      SES: 0 0
      UAS: 20 0
      AS: 2773

      INP: 2.35 5.81
      PER: 1.87 1.90
      delay: 17.17 34.90
      OR: 29.80 29.33

      Bitswap: 0 0

      Total time = 46 min 40 sec
      SF = 163133
      CRC = 4
      LOS = 0
      LOF = 0
      ES = 3
      Latest 1 day time = 46 min 40 sec
      SF = 163133
      CRC = 4
      LOS = 0
      LOF = 0
      ES = 3
      Latest 15 minutes time = 1 min 40 sec
      SF = 5900
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      Previous 15 minutes time = 15 min 0 sec
      SF = 52923
      CRC = 2
      LOS = 0
      LOF = 0
      ES = 1
      Previous 1 day time = 0 sec
      SF = 0
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      15 minutes interval [-30 min to -15 min] time = 15 min 0 sec
      SF = 52923
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
      SF = 51387
      CRC = 2
      LOS = 0
      LOF = 0
      ES = 2
      Showtime Drop Reason: 0
      Last Retrain Reason: 0

    7. #6
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      Re: Sync speed lower since stale session

      No question in my mind. You've been (auto) capped.

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      Re: Sync speed lower since stale session

      Looks like another frustrating phone call then!!

      Thanks for your help.

     

     

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