The ECI request

An ECI request can be used to make program link calls, status information calls and reply solicitation calls.

I/O parameters on ECI calls
Input parameters passed to the CICS server with an ECI call, and output parameters returned to the user application following an ECI call.
Program link calls
An ECI request to call a program on a CICS server results in a program link call to attach the CICS mirror transaction to run the server program.
Status information calls
Status information calls retrieve status information about the connection between the client and server systems.
Retrieving replies from asynchronous ECI requests
Callbacks and reply solicitation calls can be used to retrieve replies from asynchronous ECI requests.

Parent topic: External Call Interface (ECI)