A port is a communication channel through which Messages can be sent or RECEIVED in SAP .

The common port types are the TRFC Port and the File Port.

If both sender and receiver MENTION TRFC PORTS, data is exchanged via RFC connections.

If however , a file port is mentioned , the IDOC is WRITTEN in a flat file at the specified location at the sender system.Then a FTP transfer should be done from that location to the receiver system or a Middleware that will send the file to the receiver system.

The transaction to maintain ports is WE21.

A port is a communication channel through which Messages can be sent or received in SAP .

The common port types are the TRFC Port and the File Port.

If both sender and receiver mention TRFC ports, data is exchanged via RFC connections.

If however , a file port is mentioned , the IDOC is written in a flat file at the specified location at the sender system.Then a FTP transfer should be done from that location to the receiver system or a Middleware that will send the file to the receiver system.

The transaction to maintain ports is WE21.