PhoxTroT is a project that received EU funding to develop terabit/s optical interconnect technologies for data centers and high performance computing systems. The project brings together industry, research institutes and universities to realize a vision of optically disaggregated data centers with converged storage, computing and switching platforms. Key technologies the project is developing include high-volume electro-optical circuit board manufacture and assembly, silicon photonics transceivers, advanced modulation for higher bandwidth interconnects, and driving international standards. The project takes a holistic approach to synergize these optical interconnect platforms tailored for different data center layers.