The ALE Module provides a non-invasive solution to sending IDocs into an SAP application. The BAPI Module provides a non-invasive solution to calling BAPIs in an SAP application. The RFC Server Module enables RFC-enabled functions to call the connector.
The ALE Module enables consumes (service call requests) only. The BAPI Module enables service call requests and event notification. The RFC Server Module enables real-time non-invasive event notification.