Electronic fee collection -- Application interface definition for autonomous systems -- Part 2: Communication and connection to the lower layers
ISO/TS 17575‑2:2010 defines how to convey all or parts of the data element structure defined in ISO/TS 17575‑1 over any communication stack and media suitable for this application. It is focussed on mobile communication links. However, wired links shall use the same methodology.
The communication interface shall be implemented as an API in the programming environment of choice for the Front End (FE) system. The definition of this API in concrete terms is outside of the scope of ISO/TS 17575‑2:2010. ISO/TS 17575‑2:2010 specifies an abstract API that defines the semantics of the concrete API. An example concrete API is presented in Annex C. Where no distinction is made between the abstract and concrete communications APIs the term "communications API" or just "API", can be used.