Would like to plan a unified communications system using MS Office Communications Server 2007 R2 standard edition and MS SBS 2008 Premium. I like features of the OCS Enterprise edition but having to run 3 - 4 machines. If I run Windows Small Business Server 2008 Premium edition, can OCS 2007 co-exist in the same box or will a separate processor be required to run OCS. This will likely interoperate with a Cisco UC540 IP-PBX. The target orgazination is small with about 15 users but could double to about 30 within a year. Of the 15 users, 10 are co-located on site with 5 remotely accessing the system from remote locations. Where can I get help planning this configuration?