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Fault BTS ultrasite

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  • #47442 Reply
    Patrick.fr
    Guest

    Sometimes, i have a PCM failure on BTS ultrasite:

    ET => AIS
    BOIA => LED orange
    TRX => LED orange
    FXC ET1/T1 => LED green

    No alarm on Ultrasite manager

    MML => PCM failure + lap D failure

    I switch off/on PSWB => All BTS will be OK.

    I don’t why BTS is off.

    The problem is between FXC and BOIA.

    I have already changed: BOIA, FXC and rack FXC.

    Who has an idea?

    #47443 Reply
    Roni
    Guest

    Hi Patrick,

    thats problem not in your BTS.problem in transmission from BTS to BSc

    #47444 Reply
    Patrick.fr
    Guest

    No transmission problem but I have this alarm:

    I have never seen before.

    HIST> BSC1011 BCF-024 COMM 2007-05-24 11:27:32.04

    * DISTUR

    ENABLED

    (11011) 7721 COMMUNICATION FAILURE WITH BCF

    11743d

    7721 COMMUNICATION FAILURE WITH BCF
    Meaning
    Time supervision has expired or the BCF has sent a
    negative acknowledgement to the BSC, thereby cancelling
    the ongoing message transfer sequence.
    Supplementary information fields
    1 reason for the failure (DX error code)
    general error message of the system. See General Error Messages of
    System for error code explanations.
    Instructions
    Correct the possible transmission failure in the Abis interface,
    or correct the fault indicated by another active alarm in the BCF.
    Cancelling
    No cancelling.

    any idea?
    Is it possible a temperature problem? too hot? is there a pooled temperature?

    #47445 Reply
    Patrick.fr
    Guest

    I make a mistake, NO AIS on ET.

    #47446 Reply
    govindraj
    Guest

    Hi patrick,

    Hav u checked D bus allocation in the Ultasite..

    #47447 Reply
    Patrick.fr
    Guest

    The BTS are working every days. But i don’t why it cut off.

    Since one year: it cut off only between April at October. (hot month)

    How works temperature regulation?

    #47448 Reply
    Swanand_Soudagar
    Guest

    Hi Pratick,

    what do u mean by cut off. Actually in nokia BTS temprature regulation is done using FAN modules on back side of Ultra and base of metro BTS with fresh air comming from one path and hot air pushed outside using fans. there is certain threshold upto what temprature this can go smooth. once temprature crosses the limit BTS mau shut down (cut off) automatically as it is provision in NOKIA.

    #47449 Reply
    Michael
    Guest

    Hello everyone.

    Does anyone know how to clear abis problem on BTS Ultrasite? I am experiencing an Abis Problem only on sector 2. I’m pretty sure that the the antenna and cabling was all good. We already try to swap TRX’s and combiner to isolate the problem. We already changed the Branching Table. We also done 24 Hr. BER Testing and Sync Test on Radio Trs.

    Thank you all guys in advance

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