The RadioNet Joint Research Activity RINGS (Radio Interferometry Next Generation Software) meets in Dwingeloo on 11 September 2017. RINGS partners from MPG, ASTRON, JIV-ERIC, UMAN, OSO, and DIAS start the work on the main objective for RINGS: To deliver advanced calibration algorithms for the next generation of radio astronomy facilities, characterized by a high sensitivity, a high bandwidth and long baselines.