This part of IEC60870 is a functional profile (FP) and defines the provision of the TASE.2 communications services between two control centre end systems. It is supported by the transport services implemented in accordance with transport-profiles defined for the type of network that interconnects the control centre end systems. This is demonstrated in Figure1. This FP also defines the provision of the OSI connection-mode presentation and session services between the end systems. ISO/ISP14226 specifies the AMM11 profiles for MMS. The parts of ISO/ISP14226 that cover the profile that are used as a basis for this FP are ISO/ISP14226‑1 and ISO/ISP14226‑2 . This FP is in alignment with ISO/ISP14226 , as far as possible, and maintains this compatibility by reference. There are TASE.2 requirements in addition to ISO/ISP14226 . These requirements are specified in this FP. [Image removed.]