Dell Latitude E6320 (Early 2011) - Manual (Page 19)

IDER allows an Intel AMT managed client to be booted by a management console from a remote disk image. If the client
system does not support IDER, this value cannot enable it.
Option Description
Enabled IDER is enabled
Disabled IDER is disabled.
NOTE: Disabling IDER does not remove this feature but prevents it from being used.
Legacy Redirection Mode
Under the SOL/IDER page select Legacy Redirection Mode and press <Enter>.