IBM 16/4 Token-Ring manual

the system is powered off (system power cord is connected to a live power outlet). When the system is powered off, the adapter automatically inserts into the network and looks for a special frame. This frame is commonly referred to as a magic packet. Upon detection of the magic packet, the adapter signals the system to turn on the power supply, thus turning on the computer system. The magic packet is a frame sent by another computer system usually running an application that provides remote system management.

Attention: Some PCs with multiple PCI slots that support Wake on LAN and

3.3-volt auxiliary power may not have an adequate 3.3-volt power supply to power more than just a few of the slots with auxiliary 3.3 volts. Check with your PC supplier to determine the number of PCI slots that can be concurrently populated, and still meet the current limit of 375 mA per slot (for auxiliary 3.3 volts). This limit is specified in the PCI Bus Power Management Interface Specification Revision 1.1.

Chapter 1. Introduction to the IBM 16/4 Token-Ring PCI Management Adapter 3