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Just increased DSL speed, now its very weird.

Discussion in 'Networking' started by aSILENTfire, Nov 1, 2012.

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  1. aSILENTfire

    aSILENTfire Thread Starter

    Joined:
    Mar 9, 2012
    Messages:
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    We had 1.5 Mbps, but we just upgraded to 8 Mbps. Right away we noticed that we couldn't connect to the Playstation network on the PS3, and loading Google would take several tries. In some cases you couldn't even refresh the page to load Google, you would have to open a new tab. We would have bursts of good speeds from online speed tests, ranging from 8.6Mbps down to not being able to load the test, and everything in between. I just tested my ping and for the last hour or so its been above 500ms, here are some results:

    http://www.pingtest.net/result/71624436.png
    http://www.pingtest.net/result/71624613.png
    http://www.pingtest.net/result/71625193.png <--packet loss
    http://www.pingtest.net/result/71626693.png <--packet loss

    I live in Wisconsin and my ISP is Centurylink (formerly Centurytel), a technician came over yesterday and checked our box outside and inside and said that it was our Margin (db), if I remember correctly. Here is the info from my router:

    Transceiver Revision : A2pB030m1.d23a
    Vendor ID Code : 4D54
    Line Mode : ADSL_2plus
    Data Path FAST
    Transceiver Information Downstream Path Upstream Path
    DSL Speed (Kbits/Sec) 7168 895
    Margin (dB) 12.1 17.5
    Line Attenuation (dB) 41.5 21.4
    Transmit Power (dBm) 0.0 12.6

    The technician ended up lowering our speed to 6 Mbps, and said that everything looked good, and left. The Margin (db) was at 7.3 inside and 9.7 outside before he lowered it, and he thought that if we could hit 10, we would be fine. If that's the case then it seems like the margin is not the problem. If we are using too much speed could we set QoS on a router (would need a different router) to limit the bandwidth? Could the router be the problem?


    To be honest I've never in all my life seen consistent download speeds over 180Kbps, and that makes me sad.

    Please help!
     
  2. TerryNet

    TerryNet Moderator

    Joined:
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    First Name:
    Terry
    If you suspect the router is a problem connect a computer directly to the modem and test.

    It sounds like you are about as far from the CO (or closest "booster") as you can be to still get DSL at all. If that is the case then trying to get higher bandwidth by upgrading your service can make things worse. You may want to talk to tech support to see if there is any truth to my guess. (Don't talk to customer/sales support; they will be quite happy to sell you whatever service they can.)
     
  3. aSILENTfire

    aSILENTfire Thread Starter

    Joined:
    Mar 9, 2012
    Messages:
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    Right now my DSL Transceiver Diagnostics read:

    Transceiver Information Downstream Path Upstream Path
    DSL Speed (Kbits/Sec) 7168 895
    Margin (dB) 14.6 19.4
    Line Attenuation (dB) 41.5 21.4
    Transmit Power (dBm) 0.0 12.6

    I have seen the downstream Margin go as high as 17dB, but I don't know what is causing the fluctuation. Is this something a local wiretap could cause? In the past we have briefly lost internet connection when receiving a phone call, that was before we upgraded.
     
  4. TerryNet

    TerryNet Moderator

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    Mar 23, 2005
    Messages:
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    First Name:
    Terry
    That implies a bad filter (your problem) or noise on the line (ISP problem).
     
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