Static Call:- It is a call to a program which will be link edited with the main program. Dynamic call:-It is an independent program which is link edited separately. The main program just call this program
To be more specific:
If compiled as NODYNAM: CALL 'literal' is a static call CALL WS-label is a dynamic call
If compiled as DYNAM: CALL 'literal' is a dynamic call CALL WS-label is a dynamic call