Multiregion operation
For CICS®-to-CICS communication, CICS provides an interregion communication facility that does not require the use of a network access method such as ACF/SNA or TCP/IP.
This form of communication is called multiregion operation (MRO). MRO can be used between
CICS regions that reside:
- In the same z/OS® image
- In the same z/OS systems complex (sysplex).
Note: The external CICS interface (EXCI) uses a specialized form of MRO link to support communication between MVS™ batch programs and CICS.