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DRU/DTRU going in Perm fault mode E///

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  • #68870 Reply
    Amit
    Guest

    HI,

    in few sites we have observed that permanent faults are repeating, DRU/DTRU is going in fail mode, after a block/deblock TRU comes up..in some cases tie values are repeating, in some other cases (for a perticular sector) tie value is getting changed and repeating.

    actions taken:
    VSWR is Ok
    RX path balance is OK
    ICM band is OK
    s/w is up-graded n down-graded from R22/R25 (R35 tried but same result)
    DXU swapped
    Y link cables Swapped
    DRU/DTRU swapped
    IDM swapped
    There is no temperature issues observed

    in few cases BUS fault is observed.

    Pls support

    #68871 Reply
    Amit
    Guest

    Hi,

    need support..

    TRU is going fail mode, No fault codes observed.

    any idea…?

    TRU comes up after giving Block Deblock command & repeating in next day

    #68872 Reply
    Amit
    Guest

    further observations in Permanent fault in EDTRU (2204/2206 cab)

    Guys need your inputs in Permanent fault raised issues.

    Cab type 2204/2206
    Config – 4+4+4
    No of e1 – 2
    OPDCH & FPDCH TS defines for
    A sector 10
    B Sector 22
    C sector 8

    Confact -2
    SDCCH – 2

    All sectors are having EDTRU
    Still Tie Value 6-7 (B sector TRU going in fail mode(perm fault)

    With the help of BO team OPDCH/FPDCH TS reduced to 10 and issue didn’t repeated from past 15-20 days. but we are losing OPDCH TS.

    Question is, was that 22 TS creating TRU to turn in permanent fault mode ? or something else issue is there ?

    We didn’t observed such issues in 2964 BTS.

    Pls suggest as these issues are observed in many sites..

Viewing 3 posts - 1 through 3 (of 3 total)
Reply To: DRU/DTRU going in Perm fault mode E///
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