RFC and programming information for RFC client/server programs can be summarized as follows:
· An RFC connection is always initiated by an RFC client program.
· An RFC connection is always built up in two steps:
Ў Connection from an RFC client to the SAP gateway
Ў Connection from the SAP gateway to an RFC server
· There are different ways of starting or connecting to an RFC server program:
Ў An RFC server program can be started by the SAP gateway, by the currently running SAPGUI or by the currently running application server.
Ў You can register an RFC server program at an SAP gateway. The program waits for RFC requests from SAP systems.