The MicrelSwitchPhyTools_1.01.msi is a Microsoft software installer that includes the following three program For Microsoft Windows XP and newer. Simply double clip on the installer file to install them. MicrelSwitchConfigApp - Switch Configuration utility that supports KSZ8995, KSZ8895, KSZ8873, KSZ8863, and KSZ8864 MicrelMDIOConfig - MDIO configuration utility that supports all Micrel 10/100 PHY and KSZ8873, KSZ8995, KSZ8895 and KSZ9021 Evaluation Board MicrelLinkMD - LinkMD Utility that supports KSZ8895, KSZ8051, and KSZ9021 Evaluation Board