The LPUF card can not register successfully in NE40-8 router when there is no subinterface card inserted in LPUF board.
LPUF shows as Unregistered in display device command output.
1. Take out the board and plug sub-card in LPUF board.
2. Re-plug the board in the frame and it can register normally.
Sub-card is not plugged in LPUF board. The LPUF board is not able to register. There are two sub-card slots in LPUF board of NE40. Only one sub-card is plugged, LPUF board of flexible plug-in card can register at NE40.