The Keysight AresONE-S 400GE is a high-density 400 Gigabit Ethernet test platform housed in a 2RU fixed chassis. It delivers 6.4 Tbps of total line-rate traffic generation and supports stackable configurations for scaled testing up to 25.6 Tbps and beyond using the Metronome Timing System. The platform doubles port density versus the previous AresONE 400GE, available in 16-port and 8-port configurations, with both full and reduced performance models. Field upgrades from reduced to full performance are supported.
Technical Specifications
• Form Factor: 2RU fixed chassis
• Traffic Generation: 6.4 Tbps total line-rate per chassis; stackable and synchronizable for testing up to 25.6 Tbps and beyond
• Port Density: 16-port or 8-port models
• Electrical Interface: 8×56 Gb/s PAM4 encoded technology
• Supported Ethernet Speeds: 1×400GE, 2×200GE, 4×100GE, 8×50GE (PAM4); 2×100GE, 4×50GE, 2×40GE, 8×25GE, 8×10GE (NRZ)
• Signaling: PAM4 and NRZ technologies on a single platform
• Interconnect Media: QSFP-DD MSA compatible; QSFP-DD optical transceivers up to Power Class 8 (20 W max); QSFP56; passive copper cables up to 3 m (QSFP-DD) or 5 m (QSFP28/QSFP+); active electrical and active optical cables
– Key Features
• Layer 1 BERT and PCS testing for PAM4 and NRZ signaling
• RS-544 (KP4) FEC for all PAM4 speeds (400/200/100/50 GE)
• RS-FEC and FC-FEC support for NRZ speeds per IEEE standards
• Auto-negotiation and link training support for passive copper cables up to 3 m
• Digital Optical Monitoring (DOM) for device status, electrical power, and temperature telemetry
• Field-upgradable PAM4 and/or NRZ performance options
• Complete L2/3 protocol emulation via IxNetwork software
– Typical Applications
• 400GE device validation and interoperability testing
• High-speed network infrastructure verification
• Layer 1 signal integrity and forward error correction analysis
• Multi-speed Ethernet platform qualification
– Compatibility & Integration
Supports 400GBASE-DR4, 400GBASE-FR4, 400GBASE-LR4, 400GBASE-SR8, and 400G-ZR coherent optics. Active electrical cable support enables PAM4-to-NRZ signal conversion for fan-out configurations.

















