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TBF radio failure_UL

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  • #58330 Reply

    Hi all, is there anybody to know what can be reason for high percentage of TBF_Establishment_radio_failure_UL
    [ (P28) / (P62a + P62b + P62c – P438c + P507) ].It’s a radio problem per cell but info in Alcatel document is not enough.
    Thank you in advance.

    #58331 Reply


    you can check if you also have poor rate of “GSM” call setup success rate and call drop rate due to radio.

    In other words, to verify that the “radio failure” is really due to radio, check that other gsm indicators are also impacted.

    what is the value of “TBF estab fail radio rate” you are seeing ?

    #58332 Reply

    Hi Pix,
    in first thank you for assistance..
    The voice for this observed period is OK.The values of this TBF_failure_radio are aprox. from 0,60% to peak 25% and now is 20-25% and the TBF_Succ_rate from 99.8 nos is 78-80%…

    #58333 Reply


    Do you mean that there was a sudden increase in UL TBF fail radio ? From 0.6% before to 25% today ?

    In this case, it is clearly a TRX or GPU “bug”. Normally, it can besolved by restarting the GPRS in the cell, or in the whole MFS, or perhaps restarting the TRX or BTS. Good luck 🙂


    #58334 Reply

    Hi Pix, everthing is OK…
    We found that the our OMC are changed the GPRS parametrs to default and from there comes problem…:)) Once again thank you !!

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