February 17, 2021 Keysight Delivers First 16-Port 400GE Test System to Validate Evolving Network Equipment and Data Center Environments New AresONE-S enables companies to validate mixed signaling Ethernet network equipment using a single, scalable software-upgradable ultra-high-density chassis SANTA ROSA, Calif., February 16, 2021 Keysight Technologies, Inc. (NYSE: KEYS), a leading technology company that helps enterprises, service providers and governments accelerate innovation to connect and secure the world, announced the new AresONE-S 400GE test system which enables network equipment manufacturers and data center operators to validate complex, mixed 400 gigabit Ethernet (GE) and lower-speed networks and devices. Data center operators have widely deployed mature 100GE non-return-to-zero (NRZ)-based technologies. However, higher Ethernet speeds, such as 400GE, create new mixed signaling and forward error correction (FEC) implementations in data center networks, as well as multi-rate speed environments. The transition from NRZ to pulse amplitude modulation level-4 (PAM4) requires testing of both types of encoding.