Hi SSharma,
Other than Switched off/Implicit Detached Mode in VLR.
MSRN Provision is irrelevent to the present Status in VLR.
So HLR Get the MSRN from VMSC and Gives to GMSC.Then GMSC Routes the call to VMSC…Where depening upon the current situation the call may be connected / announcement/Dropped…with Cause.
Rgds