·
Low
Rx level DL& UL, Bad Qual (Interference ) DL & UL, and High TA
·
Drop
on LAC boundary.
·
SW congestion
·
Due
to TCH Congestion.
·
Hardware
issue, Timeslot Faulty, High VSWR, Alarm or Antenna Faulty, mismatch combining.
·
Interference
or error on E1.
·
Drop
due to radio failure.
·
SD drop due to MS faulty.
·
SD
drop due to mismatch Rxlev_access_min value & RACH busy threshold
·
SD
drop due to mismatch BA2 list, due to drop occur during HO.