Remote wakeup (RWU) is a general term for the powering-up of (turning on) a computer over a network. Intel's Wired for Management (WfM) network specification includes this feature. Remote wakeup can be done over a dial-up connection as well as within a local area network (LAN) (where Wake on LAN is one approach to remote wakeup).
One implementation of remote wakeup makes use of AMD's Magic Packet technology, in which the MAC (media access control), or node, address of the intended computer is repeated 16 times. The remote computer is equipped with a program that recognizes this signal, causing it to power-up. Remote wakeup is useful for downloading software updates or reconfiguring computers during off-hours when they are usually turned off.