I ment Lock an unlock the NSVCI form SGSN or BSC in order to synchronise the BVCIs.
concerning the vendors the CorePS is from Siemense and RAN is from E///
i found something but i’m not sure:
if a cell (or a site)goes down and once the issue fixed become up in our case there no synchro between the BSC and the SGSN at the BVCI level.