Sir/ Madam

I hvn't DEBIAN
I using Fedora 4 in Server. I prefer that Office Communicator because it interface, and if we use X-Lite with SER server, user have to have extra one password. other wise users can use Domain login authentication for Office communicator, no need reenter a password after logon.
My need is Utilize that CISCO ATA 186 with Windows 2003 Active Directory .
if is possible to use Windows 2003 Active Directory account for SER Server in Fedora, then I no need LCS.
I will call from PC users to ATA and ATA to PC users through SER Server.

Now I want to maintain LCS 2005 in Windows Server 2003 & SER server in Fedora.
because PC users like Office Communicator & it facilities (Chat, Video, File Sharing, Remote Assistance),& I have to maintain a communication from guard office  to other staff places but Guarders face difficulties to chat, my thing is better to have a TP communication between guard office & staff.

So that I implement SER Server in Fedora & it client application is X-Lite (like Office communicator for LCS. )
CISCO ATA 186 easily register with SER server and  able to communicate  with  X-Lite  in both direction. 
So If any communication need to Guard Office can use X-Lite & Analog TP which is connected to ATA 186.
other wise communication will be available between all exclude guard office through  Office Communicator (thorugh LCS 2005) with I mention facilities.

Now I plant to merge above server to facilitate communication  between  guard office (guarders hv to use TP through ATA 186) & staff through any one client Application ( X-Lite or Communicator or any other application).

How can I implement Messenger with TP  through ATA 186  like  above ?

I seen a help from http://www.voip-info.org/wiki/view/MS+LCS+2005+%252F+SER+%252F+Asterisk+Integration link
but that help mention LCS<<->> SER<<->>Asterisk<<->> ATA186
But I try to run Asterisk server on Fedora but it failed (there are lot of config needed).
then I try SER server & I success full on it and runing now on Fedora Core 4. 

I need like this communication LCS<<->> SER <<->> CISCO ATA186 !

Could you kindly help me to solve ?
Thank You
Your truly
Elil