One RSOE process is installed in each Unwired Server cluster member, in front of each synchronization subcomponent that communicates with a client. Replication services components and messaging services components both use RSOEs attached to their communication ports.
The RSOE configuration enables the Relay Server to identify the RSOE and connect to it. The RSOE configuration also has a single port number that enables the RSOE to make a http://localhost:port connection whenever a client request comes to it from the Relay Server.