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    Downgrade from Max to Mid

    This is a discussion on Downgrade from Max to Mid within the Sky Broadband help forums, part of the Sky Broadband help and support category; Before upgrading from Mid to Max, I had a nice stable connection. Having done ALL the tests it appears that ...

    1. #1
      castro's Avatar
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      Downgrade from Max to Mid

      Before upgrading from Mid to Max, I had a nice stable connection.
      Having done ALL the tests it appears that my line suffers from random noise, outside of my control, as ADSL2+ is not good.
      If I downgrade back to the Mid package, what is the maximum speed I can expect.
      I do not need the unlimited download facility
      I presently use Mognuts to force the router to operate in G.DMT and get these stats.

      Status: Showtime Channel: INTR, Upstream rate = 768 Kbps, Downstream rate = 7904 Kbps
      Link Power State: L0
      Mode: G.DMT
      Channel: Interleave
      Trellis: ON
      Line Status: No Defect
      Training Status: Showtime
      Down Up
      SNR (dB): 7.5 14.0
      Attn(dB): 22.0 14.0
      Pwr(dBm): 19.8 8.5
      Max(Kbps): 8480 1216
      Rate (Kbps): 7904 768


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    3. #2
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      Re: Downgrade from Max to Mid

      MID = G.DMT, so I would think you would get the same speed.

      TomD


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    4. #3
      castro's Avatar
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      Re: Downgrade from Max to Mid

      Is it possible that the Sky Router behaves differently depending which mode is selected.
      The reason I ask is that in ADSL2+ mode, if I increase the NM value to say 15 with the corresponding drop in synch speed, then I still get error problems whereas G.DMT doesn't produce any errors.
      In other words could I have a faulty router?

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      Re: Downgrade from Max to Mid

      Well yes the router's going behave differently if you change signalling mode. ADSL2+ uses a wider frequency range than ADSL1 (G.Dmt) - going up to 2.2MHz rather than 1.1Mhz. If the main noise problem is mainly in those higher frequencies, then that would explain the difference in behaviour between ADSL2+ and ADSL1 when you change the target noise margin. It is possible that the ADSL circuitry in the router is causing the problem, but the problem is more likely to be environmental, imo, i.e., there's something out there putting radio signals in the higher ADSL2+ range onto your line.

      Forcing your router to G.Dmt gives you a good idea of what life would be like on Mid, but note that in addition to the data transfer limit on Mid, you'd also get a lower upstream speed as well.

     

     

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