There has been steady growth in the number of new satcom systems that plan to make use of an RF Inter-Satellite Link (ISL) to enhance their functionality and/or efficiency. In addition to reducing the complexity and cost of the associated terrestrial infrastructure, ISL technology can enable additional networking functionality, increased service area provision, enhanced data security, and congestion load balancing capabilities. With this growth, we envisage a transformation of ISL-related systems and equipment: from bespoke, project-specific hardware to a more productised offering and associated value chain. This activity will therefore assess the feasibility of establishing commonality in the physical and digital interfaces of the various ISL components by exploring the definition of a set of consolidated ISL system architectures and associated performance specifications covering a range of different application scenarios. The goal being to enable organisations from across the ISL value chain to design products against a common set of requirements, whilst maintaining flexibility for individual system integrators in their application.