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Thread: T305 & T308 Timers in Nokia Siemens

  1. #1
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    Default T305 & T308 Timers in Nokia Siemens

    Hi Experts,
    Can u please explain me whether T305 & T308 timers are modifiable in NSN switch and if so what is the setting to be used along with T3109,T308 & T200 for reducing TCH Drops in the network.I have read in a forum that reducing the same to 2 sec will not allow pegging TCH_DROP_RADIO_FAIL in the air interface. Please share any doc if possible and let me know if there is any negative impact of reducing the value.I require this for reducing TCH Drops in the network.Looking for an urgent reply
    Regards

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  4. #2
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    Default Re: T305 & T308 Timers in Nokia Siemens

    can you atleast tell me what are the equivalent timers in nokia siemens?this is because i have not found these timers in NSN systems.....

  5. #3
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    Default Re: T305 & T308 Timers in Nokia Siemens

    Any help experts??

  6. #4
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    Default Re: T305 & T308 Timers in Nokia Siemens

    I have read in a forum that reducing the same to 2 sec will not allow pegging TCH_DROP_RADIO_FAIL in the air interface.
    Please what do you mean by this?
    I didn't get you..

  7. #5
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    Default Re: T305 & T308 Timers in Nokia Siemens

    Hi,I wanted to know about the timers T305 & T308 and their impacts on the TCH Drops by keeping too high or low values

  8. #6
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    1 out of 1 members found this post helpful.

    Default Re: T305 & T308 Timers in Nokia Siemens

    Hi

    If you keep this Timers Low then NSS end will release call before the repsones time of BSS.

    so call drop remains same , but in your KPI stats the DCR will be reduced as same is pegged at BSS entities.


    In NSN T305 and T308 are Hardcoded as per ETSI .


    Regards
    Plannerguy
    "Pls add thanks and rep if found good"

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  10. #7
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    Default Re: T305 & T308 Timers in Nokia Siemens

    Quote Originally Posted by plannerguy View Post
    Hi

    If you keep this Timers Low then NSS end will release call before the repsones time of BSS.

    so call drop remains same , but in your KPI stats the DCR will be reduced as same is pegged at BSS entities.


    In NSN T305 and T308 are Hardcoded as per ETSI .


    Regards
    Plannerguy
    "Pls add thanks and rep if found good"
    Thank you somuch for sharing the knowledge..thnx & rep added for the same...also would like to know how to reduce the same in NSN..any patch or please tell the process..its urgent!!

  11. #8
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    Default Re: T305 & T308 Timers in Nokia Siemens

    Hi

    Thanks for rep and support, with pleasure its my duty to share Knowledge.

    Same is NSS entites.i am From RF so will check with me NSS collegues and get back u.

    To may knowledge it can be changed by applying patch only .Switch guys will not have right\privilege to alter the values.

    Regards
    Plannerguy

  12. #9
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    Default Re: T305 & T308 Timers in Nokia Siemens

    This is hard coded timer but we can change
    For Implementation value:- T305-3 second &T308-2 second
    For Default value in system:- T305-30 second &T308-30 second

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  14. #10
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    Default Re: T305 & T308 Timers in Nokia Siemens

    Hi

    verifed with switch counterparts and they told below command

    ZDFD:CMM,X:5AC0018,,N,W,; may work

    but results will be in hexa and sometimes not visible.


    Regards
    Plannerguy

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