# Overview of the Interface for RED

When communicating with CICS regions and applications within the CICS regions, TIBCO Substation Interface for RED provides three major functions that user processes can use.

These functions include the following items:

- Synchronous Trigger: directly publish messages to Substation with the following options:
  - No feedback (Fire and Forget).
  - Immediate feedback that it has reached its destination (Confirmation signal).
  - Feedback that it has reached its destination, and that the destination service has either persisted or processed the message or delivered the message to an adjacent execution service.

    This is typically used for guaranteed delivery.

- Synchronous Message Transfer (Requests or Requests expecting a Reply): the ability to have a conversation with a Substation ES partner or external service routine connected to ESB.
- Multi-interface support: A CICS region can interface to one or two Substation ES RED interfaces - either in the same Substation ES or in two different Substation ES in the same or different LPARs.

Copyright © TIBCO Software Inc. All rights reserved.