In the static call the load module of the called pgm is linked with the calling pgm. While in case of dynamic call the 2 load modules stay separately.

In case of dynamic call the called pg can be used by many other pgms.

Static call, Identified by call literal eg: call 'pgm1'

               SUb-modules are link edited with the main module

               If the sub-pgm undergoes any changes,both the sub and main    

               pgms need to be recompiled.

Dynamic call, Identified by a call variable eg: call ws-pgm

                   sub-modules are picked up during the run time from the load

                   library.

                  If the sub-pgm undergoes any changes it is sufficient to recompile the sub-pgm alone.

In a static call, the call is done using a literal. Compiler option is NODYNAM
In a dynamic call, the call is done using variable. Compiler option is DYNAM