2.1 Inbound Processing

The gateway “listens” for incoming TCP/IP connection requests from remote gateways. When a request is received, an inbound session is established over which the remote gateway can present requests for service.

As shown in the figure below, when a request is received from a remote system, it is relayed to IMS which schedules the appropriate server transaction to process the request. If a response is required, the server transaction places the response in the IMS message queue. If the TMA TCP gateway is running as an OTMA client, the response is queued to the transaction pipe and delivered to the client through the cross-system coupling facility (XCF). The response is returned to the remote system over the TCP/IP connection.

Figure 2-2 IMS Inbound Processing