Toshiba Tecra M9(PTM91) Active Management Technology (AMT) 2.5.31.1084B Windows XP/Vista. This driver is a software interface that is used to communicate to the Intel AMT subsystem (Management Engine) to access Intel AMT capabilities. Communication between the local host operating system (OS) and the Management Engine (ME) is accomplished by means of the Intel Management Engine Interface driver. The Intel Management Engine Interface is bi-directional, as either the host OS or Intel? AMT firmware can initiate transactions.