solution/architecture guide for AIR, or NBU

hi,

Can a domain be created with MASter servers + few SNA clients, and no dedicated Media server ?

If yes, are their individual De-duplication pools on each SAN clients?

If yes, How will the AIR logical/schematic solution look-like for out-of-site replications?

Or, De-duplication cannot be performed in such a Domain configuration?

I am unable to find any solution/architecture guide for AIR, or NBU in general with senario, any useful pointer to material like that will be greatly appreciated.

Regards