Are you talking of these parameters
1.MAX TA Drop Call Threshold(bit)
If the filtered TA value is higher than “MAX TA Drop Call Threshold”, this is one of the conditions for triggering call drop processing due to TA beyond limit.
2.MAX TA Drop Call Switch
This parameter is used to control whether the “Call Drop for TA beyond Limit” is enabled.
3.MAX TA Drop Call Filter(0.5s)
This parameter specifies the number of measurement reports used for averaging the timing advance before call drop.
I’m a bit confused as I know these parameters will lead to call drop for TA