The integration of Information and Communication Technologies (ICT) into Power Systems (PS) has increased the interdependencies between the two systems. The operation of PS depends on several ICT-enabled grid services. ENTSO-E system state classification is a tool widely used by operators to determine the current operational state of PS. However, it does not adequately describe the impact of ICT disturbances on the operation of PS. Despite their interconnections, the operational states of both systems have so far been described separately. This paper aims to bridge the well-established ENTSO-E systems states with a new model considering the state classification of the ICT-enabled grid services. The resulting joint state description shows how performance degradation of ICT-enabled services (possibly due to disturbances) affect the operation of PS. Two examples of such ICT-enabled services, namely state estimation and on-load tap changer control, are investigated in terms of how their operational states affect the states of the PS. This demonstrates the PS-ICT interdependencies that exist in modern cyber-physical energy systems in terms of operational states.