Dell OptiPlex 990 (Early 2011) - Manual (Page 66)

Methods Overview
As discussed in the Setup and Configuration Overview section, the computer has to be configured before the Intel AMT
capabilities are ready to interact with management application. There are three methods to complete the provisioning process
(from least complex to most complex):
Configuration service — A configuration service allows you to complete the provisioning process from a GUI console
on their server with only one touch on each of the Intel AMT capable computers. The PPS and PID fields are completed
using a file created by the configuration service saved to a USB mass storage device.
MEBx interface — The IT administrator manually configures the Management Engine BIOS Extension (MEBx) settings
on each Intel AMT ready computer. The PPS and PID fields are completed by typing the 32 character and 8 character
alpha-numeric keys created by the configuration service into the MEBx interface.
TLS-PKI— Commonly referred to as Remote Configuration (RCFG) or Zero Touch Configuration (ZTC). This process
utilizes a certificate associated with the ProvisionServer. The associated certificate hash must be listed within the Intel
Management Engine BIOS Extension (MEBx).
*TLS-PKI refer as Transport Layer Security - Public Key Infrastructure*
Details on using these various methods are available in the next section.