400 Gbit/s OTN ADM Solution Brief - This solution brief describes the 400 Gbit/s OTN Add/Drop Multiplexer (ADM), an FPGA-based Virtual ASSP solution designed to flexibly map and transport 10G to 400G client services across high-capacity optical networks. Built on Agilex® 7 FPGAs and SoCs, the solution supports advanced OTN multiplexing, FlexO interfaces, granular cross-connect functionality, and scalable client configurations for next-generation optical transport applications.