Remote Function Call (RFC) is the standard SAP interface for
communication between SAP systems.
saved byReder Tseng on 2008-03-03
Transactional RFC(tRFC, previously known as asynchronous RFC) is an asynchronous
communication method that executes the called function module just once in
the RFC server. The remote system need not be available at the time when the RFC
client program is executing a tRFC. The tRFC component stores the called RFC
function, together with the corresponding data, in the SAP database under a
unique transaction ID (TID).