The principal modules associated with transaction routing are as follows:
- DFHAPRT
- is the relay program for non-APPC devices, and for APPC devices when
the device initiates a transaction by sending an attach FMH5 to CICS®.
- DFHCRT
- is the relay program for APPC devices when CICS sends an attach FMH5
to the device.
- DFHRTSU
- is the program which maintains the state of a surrogate APPC session
during syncpoint
- DFHXTP
- is the data transformation program for terminal sharing. It constructs
and interprets data streams flowing between terminal-owning and application-owning
regions, for both APPC and non-APPC transaction routing environments.
- DFHZTSP
- is the terminal sharing program. It is used by transaction routing
for devices of all types, exclusively so for non-APPC devices.
- DFHZXRL
- runs in the application-owning region to route APPC requests to the
terminal-owning region.
- DFHZXRT
- runs in the terminal-owning region to receive APPC requests from the
application-owning region, and issue them to the APPC device.
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