Serial over LAN and Integrated Device Electronics Redirection (IDER)

HI guys

i am trying to completely understand the concept of serial over LAN and IDER....
how it works
any links or tutorials... even long hard ones , I am ready to read

i did a search in google, but i feel that i need someone to help me in this

i am particulary trying to understand the following :

"Consider this scenario: A client PC in a field sales office just won’t boot; its OS has been damaged by a virus or misbehaved installation. A technician located at the corporate
Headquarters hundreds of miles away sits at a remote management console and uses Serial over LAN to change the boot device to a CD or to a CD image that is located on
his machine or another remote machine, allowing the client to boot from a Microsoft Windows* CD......"

"keyboard and text redirection (known as Serial over LAN) and full CD or floppy redirection, referred to as Integrated Device Electronics Redirection (IDER). "...

i will be great thanksful if u help me in this
it is part of the INTEL Active Management Technology research i am doing...
10x a lot in advance