I found Nion only remote power off via network.How to remote via network power on Nion?It is very useful in Conferencing Systems and paging system.

Wake on LAN?

Yes.Wake on LAN.Does need change jump cable on mainboard of Nion?

NION does not support the "Wake on LAN" feature.
Typically, NIONs stay on all the time.
However, it does certainly make sense that if we offer a way to shut them off via the web interface, we should also offer a way to turn them on. So, I understand why you ask. Unfortunately, this is not a supported feature.