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High TCH Drop due to Bad Quality Uplink

  • This topic has 2 replies, 1 voice, and was last updated 13 years ago by wirahadi.
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  • #66408

    Hello there…

    i have a problem in GSM900 system,one cell that i try to optimize have a problem with TCH drop Bad Quality uplink.

    in my opinion there is possibility external interference, and i try with change the BCCH.

    But there is no impact with change BCCH. Can any body help me to solve this problem.

    We use Ericsson system



    have you tried changing the other frequencies ?
    if there is interference on bcch, the you would see bad call setup, sdcch drop, sdcch assignment failure and tch drop.
    if there is interference on non-bcch trx, then you’d see mostly tch drop, except if sdcch ts is also located on this trx. In which case you’d see call setup failures/sd drop/sd assign fail as well.


    hi pix

    thank you for suggestion

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