Communication Server
The Communication Server Pro is designed using 2 x Dell PowerEdge servers for reliability and performance, this server is all you would need for large MDU projects that require failover support. It is capable of handling anything from 30 to 500 apartments and multiple door stations.
The Communication Server Lite is based on the Intel® NUC Mini PC and is designed for smaller MDU installs (less than 30 devices). The Lite does not support failover but does have import and export of the configuration for quickly reconfiguring a new server.