# Architecture

Substation ES RED Interface enables external applications to communicate (publish, request, or reply) with z/OS programs and transactions that are located in in batch, CICS, IMS BMP, IMS MPP or TSO regions.

Additionally, these z/OS applications can publish or redirect (trigger) output to external applications through the Substation ES RED Interface.

The Substation ES RED Interface is coupled to the Substation ES host side, enabling multiple services to simultaneously connect and communicate with each other bi-directionally. To fully understand the role and position of the Substation ES RED Interface within z/OS, refer to the Architecture diagrams and other topics in this chapter as well as the TIBCO Mainframe RED guides.

The Substation RED Interface uses Substation's internal service capabilities, the ESB communications as well as TIBCO Mainframe RED that provides users with an extremely efficient, low latency, high throughput and easily manageable environment for applications to converse with each other. This all together allows mainframe and ESB services to participate in a reliable or transaction-based, connectionless client-server protocol.

The Substation RED Interface does not replace the existing CICS or IMS Transactional interfaces but adds value, and provides performance and flexible features on top of those existing interfaces. It also allows batch and TSO programs to easily participate in z/OS to z/OS communications or bi-directionally in a z/OS to Enterprise Service Bus environment. The following figure shows Substation ES and TIBCO Mainframe RED architecture:

Copyright © TIBCO Software Inc. All rights reserved.