Input component determination

Proper relationships between input and output components can be established using the NAME macro during IMS system definition, or by using an ETO user descriptor and the Signon exit routine.

This relationship allows the terminal to specify its input component and causes output to be returned to a component that is defined during IMS system definition. Proper definition and use of input components can reduce or eliminate the need for LTERM naming conventions, MPP change calls, and inserts to alternate PCBs.

A user can establish a connection for SLU P usage by defining a component for each of the operators, devices, or processing requirements controlled by a remote application program.

IMS performs input component selection for the remote logical units and assumes that all input is from the first LTERM in the list that passes the necessary operational and security checks. For input from SLU P, input component selection is performed based on the component indicated in an optional input message header. If no function management header is received, IMS assumes the input is to be associated with the LTERM for component 1. Message switches, broadcast messages for specific LTERMs, and data replies to transactions are directed to the component associated with the specified output LTERM.