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Thread: root cause of drop call

  1. #16
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    Bad Rxlevsub and Rxqual sub during the drive test and around 300m of the site can be an indicator for bad VSWR


  2. #17
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    Depends in your network ...

    Take it as network level and check , most drop happend with which category level or quality uplink or down link also which layer 900 \1800 , after this the dececion will be easy , then u can take delta of the drop comparing between 2 dates to know where the increamnt happend ,,, after this check which cella have more drop mean contributed the drop
    You need to check after u understad the issue , TA , interfernce , path balance and alarms then if not of theses you need to go more details based on the case


  3. #18
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    Blocking can be due no resource or RF issue
    but for congested issue will be only resource issue


  4. #19
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    one of the causes of the drop call is site congestion.


  5. #20
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    Main Reason for call Drop
    1) Incorrect Neighbour List ( No Handover or Wrong Handover)
    2) Poor Receive Quality Level
    3) BTS /TRX HW Failure
    4) BSC HW/SW Failure
    5) The E1 Link Between BSC and BTS resets
    6) Too much sourounding Interference
    7)Moving to a reason where No Network support by operator




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