Our new data center interconnect (DCI) open line system (OLS) addresses the most urgent challenges for network operators by enabling commercial deployments of DCI infrastructure based on 400ZR. Having demonstrated seamless interoperability with 400ZR pluggable transceivers, the ADVA FSP 3000 DCI OLS empowers operators to rapidly expand capacity by building high-density, cost-effective, open solutions that are optimized for point-to-point applications up to 120km.