Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie

Info on ADSL2+

Options
  • 16-02-2009 8:49pm
    #1
    trueblood
    Closed Accounts Posts: 13 ✭


    Hi there.
    I'm hoping someone can give me advice on my BT adsl2+ package.
    I've just signed up to BT Ireland on an LLU exchange (Foxrock) and went for option 3 - (up to) 24mbps. However the modem only syncs at 8126 down 507 up.
    My link information is:

    Uptime: 0 days, 1:10:33
    Modulation: G.992.5 annex A
    Bandwidth (Up/Down) [kbps/kbps]: 507 / 8.126
    Data Transferred (Sent/Received) [MB/MB]: 68,38 / 55,92
    Output Power (Up/Down) [dBm]: 12,5 / 0,0
    Line Attenuation (Up/Down) [dB]: 19,5 / 36,0
    SN Margin (Up/Down) [dB]: 28,5 / 7,5
    Vendor ID (Local/Remote): TMMB / IFTN
    Loss of Framing (Local/Remote): 0 / 0
    Loss of Signal (Local/Remote): 0 / 0
    Loss of Power (Local/Remote): 0 / 0
    Loss of Link (Remote): 0
    Error Seconds (Local/Remote): 0 / 0
    FEC Errors (Up/Down): 0 / 30.831
    CRC Errors (Up/Down): 0 / 25
    HEC Errors (Up/Down): 0 / 24

    I'd really appreciate if someone could translate this and tell me if I should be getting higher speeds on ADSL2+ with these link stats.

    Thanks very much

    TB


Comments

  • Options
    #2
    Simi
    Registered Users Posts: 1,873 ✭✭✭Simi


    Hmm with those line stats you should be syncing at around 13390Kbps (Rough estimate from http://www2.farina1.com/adsl/). Some thing's up all right.


  • Options
    #3
    PogMoThoin
    Closed Accounts Posts: 13,874 ✭✭✭✭PogMoThoin


    Line looks crap, try these steps first and report back


  • Options
    #4
    trueblood
    Closed Accounts Posts: 13 ✭trueblood


    Simi wrote: »
    Hmm with those line stats you should be syncing at around 13390Kbps (Rough estimate from http://www2.farina1.com/adsl/). Some thing's up all right.

    Thats what I thought too.

    I've done everything suggested in the link from PogMoThoin, the SN Margin has improved (see new stats below) and according to the website above I should get higher sync (BT said that they have set it at this sync speed due to line quality) but is the above site a good indicator of expected speed or can someone explain the stats below to me - are they very bad?

    Thanks

    Uptime: 0 days, 0:00:11
    Modulation: G.992.5 annex A
    Bandwidth (Up/Down) [kbps/kbps]: 507 / 8.127
    Data Transferred (Sent/Received) [KB/KB]: 10,00 / 27,00
    Output Power (Up/Down) [dBm]: 12,5 / 0,0
    Line Attenuation (Up/Down) [dB]: 19,5 / 36,0
    SN Margin (Up/Down) [dB]: 27,5 / 10,0
    Vendor ID (Local/Remote): TMMB / IFTN
    Loss of Framing (Local/Remote): 0 / 0
    Loss of Signal (Local/Remote): 0 / 0
    Loss of Power (Local/Remote): 0 / 0
    Loss of Link (Remote): 0
    Error Seconds (Local/Remote): 0 / 0
    FEC Errors (Up/Down): 57 / 0
    CRC Errors (Up/Down): 67 / 0
    HEC Errors (Up/Down): 14 / 0


  • Options
    #5
    dub45
    Moderators, Technology & Internet Moderators Posts: 12,448 Mod ✭✭✭✭dub45


    Your sn margin is pretty dire once it falls below the 10 you are usually in trouble.

    http://www.kitz.co.uk/adsl/lowSNR.htm


  • Options
    #6
    Bohrio
    Registered Users Posts: 2,752 ✭✭✭Bohrio


    trueblood wrote: »
    Thats what I thought too.

    I've done everything suggested in the link from PogMoThoin, the SN Margin has improved (see new stats below) and according to the website above I should get higher sync (BT said that they have set it at this sync speed due to line quality) but is the above site a good indicator of expected speed or can someone explain the stats below to me - are they very bad?

    Thanks

    Uptime: 0 days, 0:00:11
    Modulation: G.992.5 annex A
    Bandwidth (Up/Down) [kbps/kbps]: 507 / 8.127
    Data Transferred (Sent/Received) [KB/KB]: 10,00 / 27,00
    Output Power (Up/Down) [dBm]: 12,5 / 0,0
    Line Attenuation (Up/Down) [dB]: 19,5 / 36,0
    SN Margin (Up/Down) [dB]: 27,5 / 10,0
    Vendor ID (Local/Remote): TMMB / IFTN
    Loss of Framing (Local/Remote): 0 / 0
    Loss of Signal (Local/Remote): 0 / 0
    Loss of Power (Local/Remote): 0 / 0
    Loss of Link (Remote): 0
    Error Seconds (Local/Remote): 0 / 0
    FEC Errors (Up/Down): 57 / 0
    CRC Errors (Up/Down): 67 / 0
    HEC Errors (Up/Down): 14 / 0

    Leave the modem connected and give it a few days. If you have already done it give tech Support a call and ask them to adjust your profile manually. BT have a system that automatically checks each LLU line and adjust the speed profile to the best the line can handle, it doesnt seem to be working in your case for some reason.

    CRC/HEC errors again, specially on your upstream means, normally, an unfiltered device (phone/Sky). Check this too, this will not help you gain your missing bandwidth but it will improve your maximum throughput.


  • Advertisement
  • Options
    #7
    trueblood
    Closed Accounts Posts: 13 ✭trueblood


    Bohrio wrote: »
    Leave the modem connected and give it a few days. If you have already done it give tech Support a call and ask them to adjust your profile manually. BT have a system that automatically checks each LLU line and adjust the speed profile to the best the line can handle, it doesnt seem to be working in your case for some reason.

    CRC/HEC errors again, specially on your upstream means, normally, an unfiltered device (phone/Sky). Check this too, this will not help you gain your missing bandwidth but it will improve your maximum throughput.


    Thanks Bohrio.
    I have checked the wiring again. DSL goes from DSL side of filter to modem, everything else goes from phone side.

    Also I contacted BT Tech support last week and they checked with second level support who said that 8/512 was the line max. Are you saying that these stats look like the line should support more?
    This is how they look this morning-SNR seems to move around a lot but its higher now.

    Modulation: G.992.5 annex A
    Bandwidth (Up/Down) [kbps/kbps]: 507 / 8.127
    Data Transferred (Sent/Received) [MB/MB]: 27,28 / 193,03
    Output Power (Up/Down) [dBm]: 12,5 / 0,0
    Line Attenuation (Up/Down) [dB]: 19,5 / 36,0
    SN Margin (Up/Down) [dB]: 28,5 / 12,0
    Vendor ID (Local/Remote): TMMB / IFTN
    Loss of Framing (Local/Remote): 0 / 0
    Loss of Signal (Local/Remote): 0 / 0
    Loss of Power (Local/Remote): 0 / 0
    Loss of Link (Remote): 0
    Error Seconds (Local/Remote): 0 / 0
    FEC Errors (Up/Down): 0 / 59.979
    CRC Errors (Up/Down): 0 / 65
    HEC Errors (Up/Down): 0 / 58


  • Options
    #8
    PogMoThoin
    Closed Accounts Posts: 13,874 ✭✭✭✭PogMoThoin


    trueblood wrote: »
    Thanks Bohrio.
    I have checked the wiring again. DSL goes from DSL side of filter to modem, everything else goes from phone side.

    Also I contacted BT Tech support last week and they checked with second level support who said that 8/512 was the line max. Are you saying that these stats look like the line should support more?
    This is how they look this morning-SNR seems to move around a lot but its higher now.

    Modulation: G.992.5 annex A
    Bandwidth (Up/Down) [kbps/kbps]: 507 / 8.127
    Data Transferred (Sent/Received) [MB/MB]: 27,28 / 193,03
    Output Power (Up/Down) [dBm]: 12,5 / 0,0
    Line Attenuation (Up/Down) [dB]: 19,5 / 36,0
    SN Margin (Up/Down) [dB]: 28,5 / 12,0
    Vendor ID (Local/Remote): TMMB / IFTN
    Loss of Framing (Local/Remote): 0 / 0
    Loss of Signal (Local/Remote): 0 / 0
    Loss of Power (Local/Remote): 0 / 0
    Loss of Link (Remote): 0
    Error Seconds (Local/Remote): 0 / 0
    FEC Errors (Up/Down): 0 / 59.979
    CRC Errors (Up/Down): 0 / 65
    HEC Errors (Up/Down): 0 / 58


    12 isn't alot higher, your last result was 10. Anything under 10 is dire, 12 isn't much of an improvement over 10

    Although the calculator says 13-14mbit :confused:


  • Options
    #9
    trueblood
    Closed Accounts Posts: 13 ✭trueblood


    Thanks for the replies

    When I rang BT it was very hard to convince them that the adsl calculator means anything - their system said different.
    I suppose, in a nutshell, is that calculator right or is BT right and is it worth another call to BT quoting what Bohrio suggested.:confused:


Advertisement