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QDD-400G-DR4-S-RF

400GQSFP-DDTranscvr400GBASE-DR4MPO12,500mprlllREMANUFACTURED

QDD-400G-DR4-S-RF is a professionally remanufactured Cisco 400G QSFP-DD DR4 single-mode fiber optical transceiver module, designed for high-density 400 Gigabit Ethernet connectivity in data center core and aggregation switching environments. This module supports parallel single-mode fiber transmission over four lanes using 100G PAM4 signaling, making it well-suited for high-performance spine-leaf architectures and hyperscale data center interconnects at reaches up to 500 meters.

This remanufactured optical transceiver meets Cisco performance specifications and has been thoroughly inspected and tested to ensure full functionality. Validation includes verification of optical transmit and receive power levels, lane-by-lane PAM4 signal integrity testing, and compatibility confirmation with Cisco Nexus and other supported platforms.

Key Features:
• 400G QSFP-DD (Quad Small Form-Factor Pluggable Double Density) form factor for high-density port configurations
• DR4 optical specification supporting 4x100G PAM4 lanes over parallel single-mode fiber (PSM4)
• Up to 500 meter reach over OS2 single-mode fiber using MPO-12 connector interface
• Central wavelength of 1310 nm per lane with low power consumption optimized for dense deployments
• Cisco Secure Boot and digital optical monitoring (DOM) support for real-time diagnostics
• "RF" designation indicates Cisco Remanufactured Factory product, refurbished and validated to Cisco quality standards