thanx for your explanation.
i have one alarm on my BSC(NOKIA 3i),this alarm says that my definition of target cell in sorce BSC is invalid(ALARM NO=2725
alreday i checked my database an fix this alarm but still a few of this alarm remain on my bsc.
imagine this situation:
this alarm(2725) shows that a few handover that start from serving cell to target cell became fail (for reason of incorrect cell difinition of target cell in source bsc)
MY BSC IS NOKIA ANS TWO MSC ARE SIEMENS.
what happens when a handover routed from serving switch to target switch that handover fails?
meanwhile i check my External Lac in Two MSC and no problem exists.
please clarify me to fix this alarm.