Illustration of the EXCI EXEC CICS interface

This diagram illustrates the EXEC CICS interface, and how it resolves to the six EXCI CALLs.

Figure 1. Illustration of the external CICS interface using the EXEC CICS command
This diagram shows the MVS Client Application issuing an EXEC CICS LINK command . The EXEC interface stub DFHXCSTB calls the EXCI EXEC interface program which issues the following calls: INITIALIZE_USER, ALLOCATE_PIPE, OPEN_PIPE, DPL, CLOSE_PIPE, DEALLOCATE_PIPE