Communication System Setup in SAP BTP ABAP Environment

A Communication System in the SAP BTP ABAP Environment is a configuration object that represents an external system or service that the ABAP Environment needs to communicate with, such as another SAP BTP service, an external API, or an on-premise system. Developers use it to define the technical details of the remote endpoint — including host, credentials, and connection settings — as a foundation for establishing secure, managed integrations. It is typically set up alongside a Communication Arrangement and Communication User to enable scenarios like calling external APIs or connecting to on-premise systems via RFC.