sddh drop reasons
1. Excessive TA,overshooted cell
2. Interferance CO Bcch
3. If no Tch avlable Time of HO or time of orignatin of call.
4. Wrong Defination( Causes HO Failoure)
5. Bad RX Level
6. ICM Band Interference
7. Site physicaly not optimized( Orientation, tilt, Having swap in rf cables )
9. Hardware failure.
10.Transmission Link Fluctution or failure.