SAP Basis

ADM100 Lesson: Fundamentals and Types of RFC
Figure 144: The RFC Interface
Describe at this point how systems exchange data with each other with a
Remote Function Call (RFC) using standardized communication routines.
These communication routines are provided using an interface. This
performs the conversion of the parameter data, calls the communication
routines, and handles errors.
A Remote Function Call is a call of a function module that is running in a
different system to the calling program. You can also call a function module
in the same system as an RFC; however, RFCs are usually used when the
calling and called function modules are running in different systems.
In the SAP system, the RFC interface system provides this function. The
RFC interface system allows function calls between two SAP systems or
between an SAP system and an external (non-SAP) system.
RFC is an SAP interface protocol that is based on CPI-C and allows
cross-host communication between programs. This means that ABAP
functions can be called from external applications and tools, and that
external applications can be called from the SAP system.
RFC means that the ABAP programmer does not have to write his or her
own communication routines. For an RFC call, the RFC interface
• Converts all parameter data to the format required in the remote
system
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