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Nokia Alarm combination

Viewing 15 posts - 1 through 15 (of 23 total)
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  • #45334 Reply
    manoj
    Guest

    Can somebody help me with troubleshooting of Nokia BTS wrt to the combination of alarms dispalyed for that sector.

    For instance 7745 + 7743 suggest problem in feeder link

    #45335 Reply
    patrick
    Guest

    cancel alarm, 7745 and 7743.

    example:
    ** ALARM TRX -003 C74929B
    (16095) 7745 CHANNEL FAILURE RATE ABOVE DEFINED THRESHOLD
    02 01 00 00 00 00 00 00 00 00 00 100d

    ZEOR:25:16095;

    ZEOR: n° bcf: n° alarm;

    Last number is very important,
    if the alarm come back, you have a really problem.

    If you have 100D = 100% failure

    CHECK:

    – ROSS feeder
    – change TRX
    – change copler

    If it is not material, check channel plan frequencie.

    good luck.

    #45336 Reply
    Manoj
    Guest

    Patrick thanks for the reply,but it is not just the combination of 7745 and 7743,I am intersted in.I would appreciate if you could provide the full list of all possible combination of alarms

    #45337 Reply
    patrick
    Guest

    Alarm are logical in NOKIA.

    If you have a real example, i can answer you.
    I have 8 years experience in telecom field.

    #45338 Reply
    Rahul
    Guest

    HI PATRICK
    can u help me with this alarm
    7723 FAILURE IN SENDING SYSTEM INFORMATION TO BTS SITE
    0C 13028d
    thanx

    #45339 Reply
    patrick
    Guest

    Failure sending …

    appears when PCM link is cut (storm, rain(microwave) or breakdown)

    it is stay in memories. You can cancelled by ZEOR or to do lock/unlocked of BCF (ZEFS)

    I don’t why it is stay in memories. (BUG? i think)
    the main alarm when PCM link is cut is: BTS O&M link failure + bcch missing

    #45340 Reply
    un7fda
    Guest

    HI PATRICK

    Many thanks for answers.
    For me it was instructive.
    At me not wide experience in the field of a telecommunications. I only study.
    Patrick help please algorithm of troubleshooting and elimination at failure:
    7725 TRAFFIC CHANNEL ACTIVATION FAILURE 02
    THANKS.

    #45341 Reply
    PATRICK
    Guest

    it is not important alarm but there is extract of NED:

    Meaning
    The system has blocked the radio time slot because the call
    control has failed a number of times in the activation of
    a traffic channel.
    Supplementary information fields
    1 Type of the channel whose TCH activation failed
    The channel type can be “TCH” , “SDCCH” or “Packet Data TCH”.
    The number value “0” indicates “TCH”, “1” indicates “SDCCH”
    and “2” indicates “PDTCH” (Packet Data Traffic TCH).
    Instructions
    if the failure type is “PDTCH”, the alarm is cancelled automatically
    by the system, when no more failure indications are observed

    if the channel type is “TCH” or “SDCCH”, cancel the alarm with the MML
    command EOR. Deblock the radio time slot by first aligning the TRX
    in question with the command ERS and then removing the alignment
    of the TRX
    Cancelling
    If the channel type is “TCH” or “SDCCH”, cancel the alarm with a command
    before taking the steps described in the INSTRUCTIONS, if the alarm has
    not been cancelled before. See instructions on base transceiver station
    alarms handling.

    #45342 Reply
    un7fda
    Guest

    HI PATRICK
    In this case the type of failure 02 that is “PDTCH” (Packet Data Traffic TCH) is clearly, from NED is not clear as to find the reason which causes the given failure and her{it} to remove.
    Thanks.

    #45343 Reply
    un7fda
    Guest

    Рatric, I know at you very much wide experience with equipment Nokia, please share also experience on elimination of failure: Rx levels differ too much between main and diversity antennas.
    Thanks!

    #45344 Reply
    Rahul
    Guest

    Hi patrick
    thanx
    can u clearify this alarm
    ” Bts with no transaction” This alarm come when the Sector in not Taking Calls
    How can we resolve the problem

    #45345 Reply
    Patrick
    Guest

    Rx levels differ too much between main and diversity antennas.

    When you make a commisionning, the BTS make a check of ROSS of feeder.

    So, if you have “RX level …” you have a problem on feeder or copler or antenna or LNA

    On MMI, you have RSSI comparaison value, you can see difference between main and div.
    “RX level…” appears when difference is superior at 3 or 4. I don’t remember.

    #45346 Reply
    un7fda
    Guest

    HI PATRICK
    Many thanks.

    #45347 Reply
    patrick
    Guest

    Rahul – 23 Jul 2006

    ALARM 7738
    I don’t have a solution for this alarm.

    #45348 Reply
    sunggus
    Guest

    Hi,

    Alarm 7738: BTS WITH NO TRANSACTIONS, could be occur by two reasons:
    1. No incoming call, i.e due to DVxx is broken.
    2. The cell facing the very rural area, so nobody make call.

    The alarm itself will be generated if in one hour continuously detected no call, and the alarm will be cancelled if after one hour detected call has made.
    If such alarm occurs, just replace the DVxx or made call in that cell.

Viewing 15 posts - 1 through 15 (of 23 total)
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