gtps2m0nACF/SNA Data Communications Reference

TPF as Host Node SLU

TPF applications may appear as host node secondary LUs to be compatible with certain types of IMS and CICS logical units. With this support, users can write applications to communicate with CICS, IMS, and/or a second TPF system via a standard SNA interface program. CICS, IMS, and TPF data formatting requirements are resolved in the user's applications. TPF transmits the data, processes errors, and provides the SNA interface segments. TPF host node SLU support allows you to perform:

Relay routing
Non-SNA terminals, in a TPF domain, access an IMS or CICS database or both.

Transaction routing
A TPF application dynamically determines which input messages should be forwarded to another system for processing.

Data acquisition
The ability to request data from an IMS or CICS database or both. This data is usually needed to respond to a request from a logical unit in the TPF domain.