Besides scheduling TPs in response to inbound requests, APPC/MVS also allows for inbound requests to be routed to an APPC/MVS server.
An APPC/MVS server is an MVS™ application that uses the Receive_Allocate callable service to receive inbound conversation requests directly (rather than through a transaction scheduler). APPC/MVS servers avoid the overhead associated with APPC/MVS scheduling. See Figure 1 for an example.
Because APPC/MVS servers can process multiple inbound conversations concurrently, a single server address space might contain multiple interleaved (or overlapping) conversations concurrently.