For COBOL CALL literal statements, the compiler allows you to specify
whether your
program uses static or dynamic calls
to Language Environment callable
services (or other subroutines):
- When a COBOL program makes a static call to a Language Environment callable service, the Language Environment resident routine (a callable service stub) is link-edited with the program.
- When a COBOL program makes a dynamic call to a Language Environment callable service, the Language Environment resident routine is not link-edited with the program.
Only COBOL programs compiled with Enterprise COBOL for z/OS, COBOL for OS/390 & VM, COBOL for MVS & VM or COBOL/370 can
call Language Environment callable
services.
Note: You can use dynamic calls from VS COBOL II programs
to Language Environment Date/Time
callable services. You cannot use dynamic call from VS COBOL II programs
to other Language Environment callable
services. You cannot use static calls from VS COBOL II programs
to any Language Environment callable
services.
For more information about COBOL static and dynamic calls, see 
the appropriate version of the COBOL programming guide
in the COBOL library at Enterprise COBOL for z/OS library.
For more information on Language Environment callable services, which can be used by COBOL, see z/OS Language Environment Programming Reference.