Our successful interoperability trial with Acacia Communications and Inphi Corporation shows a clear path to open and programmable DCI networking. It showcased 400Gbit/s transport using our next-generation FSP 3000 DCI open line system as well as low-power 400ZR pluggable QSFP-DD transceivers from Acacia and Inphi. Test results proved that this multi-vendor ecosystem built on best-in-class components exceeds all OIF 400ZR Implementation Agreement performance metrics.