An OpenTP1 system can communicate with a non-OpenTP1 system by using message control facilities (MCF) that comply with a variety of communication protocols. Using MCF, you can configure a parallel or vertically distributed network system that includes non-OpenTP1 systems.
The following software products are prerequisites for using the OpenTP1 message control facilities:
UAPs that use message control are known as message-handling programs (MHPs). In addition, some messages can be sent and received using an SPP.