CICS 3270 Bridge Support

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# CICS 3270 Bridge Support

This document describes CICS 3270 Bridge support.

The following topics are covered:

- Default Support of CICS 3270 Bridge

- Full CICS 3270 Bridge Support

- NCIXFATU - NCI Load Module

- Profile Parameter DSC=OFF Recommended

## Default Support of CICS 3270 Bridge

By default, Natural CICS Interface supports the CICS 3270 Bridge by being able to deal with "bridged devices", that is, terminals which are emulated via a CICS 3270 bridge exit.

## Full CICS 3270 Bridge Support

If you want full CICS 3270 Bridge support, you have to install the NCI load module `NCIXFATU`. Refer to the corresponding installation step in Installing Natural CICS Interface on z/OS in the Natural Installation documentation.

## NCIXFATU - NCI Load Module

The `NCIXFATU` module is a CICS `XFAINTU` Global User Exit (GLUE). Its purpose is to release Natural resources in case the bridge facility's keep-time has expired and an associated Natural session has not been terminated yet.

The `NCIXFATU` module calls the `NCIZNEP` module through `EXEC CICS LINK`, which performs a Natural session cleanup.

## Profile Parameter DSC=OFF Recommended

When you are using the CICS 3270 Bridge, you are recommended to start a Natural session with profile parameter `DSC``=OFF` (data-stream compression for 3270-type terminals disabled) to force Natural always to send full screens rather than the delta to the previous screen.

### On this page

- Default Support of CICS 3270 Bridge
- Full CICS 3270 Bridge Support
- NCIXFATU - NCI Load Module
- Profile Parameter DSC=OFF Recommended