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Upstream SNR jump ?

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  • 01-07-2011 5:18pm
    #1
    _John C
    Registered Users Posts: 387 ✭✭


    What could have caused my upload SNR to jump to 31.00, its usually 21.00 or 22.00?? Maybe exchange work/upgrade? According to the NGB map; my exchange is due to be upgraded between April - June.

    Here are my stats for the last few days. Note the upload SNR for 30-06-11.

    Motorola Netopia 2247-62 Software Version 7.8.2r2
    21-06-11 SYNC     ATTN DN   SNR DN   ATTN UP  SNR UP  MOD   DATA PATH

18:50   7168/384  23.00     12.20    11.50    20.00   DMT   INTERLEAVE

22-06-11 SYNC     ATTN DN   SNR DN   ATTN UP  SNR UP  MOD   DATA PATH

15:25   7168/384  23.00     12.30    11.50    21.00   DMT   INTERLEAVE
20:15   7168/384  22.50     11.90    12.00    19.00   DMT   INTERLEAVE

25-06-11 SYNC     ATTN DN   SNR DN   ATTN UP  SNR UP  MOD   DATA PATH

18:33   7168/384  23.00     12.20    11.50    22.00   DMT   INTERLEAVE
19:00   7168/384  23.00     12.00    12.00    21.00   DMT   INTERLEAVE
22:38   7168/384  22.50     12.00    12.00    21.00   DMT   INTERLEAVE

29-06-11 SYNC     ATTN DN   SNR DN   ATTN UP  SNR UP  MOD   DATA PATH

10:50   7168/384  23.00     12.00    12.00    22.00   DMT   INTERLEAVE

30-06-11 SYNC     ATTN DN   SNR DN   ATTN UP  SNR UP  MOD   DATA PATH

11:42   7168/384  23.00     12.00    11.50    31.00   DMT   INTERLEAVE
11:57   7168/384  23.00     11.90    12.00    31.00   DMT   INTERLEAVE 
12:41   7168/384  23.00     12.00    12.00    31.00   DMT   INTERLEAVE 
19:00   7168/384  23.00     11.50    12.00    31.00   DMT   INTERLEAVE

    Getting the same results today aswell.
    Theres no problem but does anyone have any ideas why this happened?

    all the best,
    John


Comments

  • Options
    #2
    jay93
    Registered Users Posts: 3,323 ✭✭✭jay93


    A jump in SNR is a positive thing the higher it goes the better :)
    They probably were doing some upgrades on the exchange for it to jump up from 21-31 thats a huge jump :P


  • Options
    #3
    _John C
    Registered Users Posts: 387 ✭✭_John C


    Yes its a huge jump that went in a positive direction but isnt it strange that attn up/down or SNR down havent changed some bit aswell. I understand that the attn value is obtained from the line length and quality. Maybe something strange in the DSLAM :confused:

    Same results today.
    01-07-11 SYNC     ATTN DN   SNR DN   ATTN UP  SNR UP  MOD   DATA PATH

13:18   7168/384  23.00     12.00    12.00    31.00   DMT   INTERLEAVE 
23:06   7168/384  23.00     11.80    12.00    31.00   DMT   INTERLEAVE


  • Options
    #4
    _John C
    Registered Users Posts: 387 ✭✭_John C


    Just tried 2 different modems:

    Netopia 3347W SNR UP = 29dB
    Netopia 2247-02 (with faulty wifi module) SNR UP = 29dB

    So Ive got 3 modems giving me roughly the same result, so it aint my modem. Something must have been changed at the exchange.


  • Options
    #5
    eircom: Ant
    Closed Accounts Posts: 1,138 ✭✭✭eircom: Ant


    _John C wrote: »
    Just tried 2 different modems:

    Netopia 3347W SNR UP = 29dB
    Netopia 2247-02 (with faulty wifi module) SNR UP = 29dB

    So Ive got 3 modems giving me roughly the same result, so it aint my modem. Something must have been changed at the exchange.

    Hi John C,

    Thanks for the posts.

    As Jay93 says, an increase in SNR UP is a positive thing. This may have been due to work on the exchange as you say. An engineer may have been doing some work in your area. Then it could have been something removed off your line - affecting noise on your connection

    PM your phone number or let me know if you have any problems on your broadband connection.

    Kind regards,
    Ant


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