Dear kanai!
MNRF in HLR is cleared after Alert_SC_ack from SC. In unsucsessful case Alert_SC_req may be repeated several times. If all this attempts were unsucsesful then MNRF is deleted when a sutable time period has expired. In HLR phase1 MAP service Alert_SC_req is not confirmed by SC and MNRF is deleted after Alert_SC_req. With Regards, Pan/