Modules

Figure 1 gives an overview of the modules involved with interregion communication.
Figure 1. Interregion communication
This figure shows an overview of the modules involved with interregion communication, as described in the text below.
The modules for IRC are of two types:
  1. The interregion communication program: DFHIRP.
  2. CICS® address space modules: DFHCRC (interregion ESTAE exit), DFHCRNP (CICS interregion connection manager), DFHCRR (interregion session recovery), DFHCRSP (CICS interregion communication startup module), DFHZCP (CICS terminal management program), and DFHZCX (which includes DFHZIS2, the interregion service subroutines).