Hi
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Your function module should be RFC if you want it to use in Other server.
RFC stands for REMOTE FUNCTION CALL RFCs are used to
establish a connection between two different application
servers rfc used for accessing functions of a function
module in a function group present on different application
servers with in a landscape i.e., for transfer of data
directly between source and target client on remote systems
in sap system landscape.
in sap basis rfc is used for remote client copies.
Tcode RFC- sm59 display/maintain
FUNCTION MODULE contains functions in particular to a module
like finance , HR , MM....... .Function module is always
created under function group. one group can contain one or
more function modules a function module can be accessed from
remote system where u can call it as RFC call.
u create function module in following way
1.tcode- sm37
2.create a function group
3.activate the function group
4.create the function module
5. activate the function module
6. access the function module
