# Component Summary

The section lists the components that are used for this sample.

- `XTR3`: CICS transaction ID of the request initiator
- `SXX31RR1`: the CICS RED C application program
- `RED-RR-REQUEST`: the Substation ES trigger identification for initiating requests
- `SXJRRRCP`: the JCL member that submits EMS Consumer/Producer
- `SXJ3RRCP`: the C Consumer/Producer application program which receives a request message from EMS server and produces a reply message
- `RED-RR-ANSWER`: the Substation ES recipe identification for receiving replies
- `SXCREPLY`: the Substation ES Request or Reply module

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