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  • This topic has 4 replies, 1 voice, and was last updated 15 years ago by ghost.
Viewing 5 posts - 1 through 5 (of 5 total)
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  • #48432 Reply
    Karen Thompson


    If one has BER (and having CRC & T200 Expiry) on LAPD, but no PCM alarm. How to get rid of BER ??

    System is Nokia.

    Any suggestions ????


    Karen T.

    #48433 Reply

    recreate this Lapd to another BCSU

    #48434 Reply
    Geoff C

    Karne we have seen this also, using the new commands in S11 (I think)
    It is likely that you have depending on your config, and the way the transmission is mapped

    1) either a single TRX with issue
    2) You use Aggregate bearers and this is an indication of far end link.
    3) The errors are low enough not to cause a problem at “Mb but are likely to be causing service degradation. Also look for “unsolicited datalink re-establishment alarms” at the BSC

    #48435 Reply

    Are you sure? you don’t have alarm on PCM?

    check with command =>

    local and remote must be 100%

    other statistic = 0

    NOINSGN incoming signal missing
    AIS AIS state has been detected in the incoming line signal (continuous “1-state”)
    FALOST frame alignment has been lost
    REMOTE alarms from remote end
    TOTAL TIME measured total time
    AVAIL TIME time of availability
    UNVAIL TIME time of unavailability
    EFS seconds without errors
    ES seconds with errors
    SES seconds with a great number of errors
    DM deteriorated minutes

    #48436 Reply

    In Nokia, command ZDMX can show to you statistic about BER, CRC Errors and T200 exparation for each LAPD link under BSC.

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