Patent ID: 7434071
Filing Date: 2008-10-07
Classification: H04L

Abstract:
1. A multi-state recognition device applied in a server blade system having a blade server and a system management unit, wherein the system management unit is for managing the blade server, the multi-state recognition device is for receiving a server power signal outputted by the blade server and a user selection signal outputted by the system management unit, the server power signal has a plurality of states, and the user selection signal has a plurality of states, while the blade server, the system management unit, and the multi-state recognition device all receiving a main power source signal. the multi-state recognition device comprising: a first logic circuit, which receives the server power signal and the user select signal; and a first multi-color light emitting diode (LED) coupled with the first logic circuit for displaying a plurality of light signal states, wherein the multiple states of the user selection signal comprise a second non-enabled state and a second square-wave state; and when a user selects the blade server or the blade server fails, the user selection signal is at the second squarewave state, the user selection signal has a second frequency.