The Data Listener Communication Sources are passive methods of receiving data. The Data Listener will not poll any device, it will simply listen for data to come in on the associated communication channel. Common uses for Data Listeners will be barcode scanners, RFID scanners, or another application that has the capability of sending unsolicited data. The DataXchange ODI provides Data Listener data as well.
When defining a Data Listener a name must be provided to identify the listener. The name will be used when expressions are assigned to ensure an expression is using the appropriate data listener if multiple have been defined.
There are two different Communication Sources for Data Listeners: Data Listener TCP, and Data Listener Serial. Data can be received from both protocols.