[Serusers] Integrate LCS & SER Server

Sir/Madam I'm a System administrator of Institute. I use MS LCS 2005 SP1 Enterprise edition & Office Communicator in my work place. I have linux SER Server & CISCO ATA 186 Telephone adapter. I have to run to Messenger client X-Lite for SER Server and Office Communicator for LCS. Because I place TP in Guard Office they can call Staff through SER server / X-Lite. But can't call Office Communicator! CISCO ATA 186 can't registering in LCS, I thing it not possible directly. ( Because LCS use Active Directory Account through Kerbas & NTLM authentication). So I want integrate LCS & SER Server to facilitate TP call to Office Communicator & Office Communicator call TP. I use a pool in LCS as normal TCP (not TLS). SER Server also use normal (with out DB -Any one can registrar with any name) Could you kindly tell the process for integrate LCS & SER Server? Thank You Your truly Elil