| Main centres: | 1-3 business days |
| Regional areas: | 3-4 business days |
| Remote areas: | 3-5 business days |
The Cisco QDD-400G-FR4-S is a high-speed 400G QSFP-DD optical transceiver designed for long-reach single-mode fiber applications. Operating on CWDM wavelengths (1271nm, 1291nm, 1311nm, and 1331nm), it supports transmission distances of up to 2km, making it ideal for data center interconnects, enterprise backbones, and service provider networks.
Built for efficiency and interoperability, this module supports PAM4 modulation with low power consumption and advanced digital diagnostics. Its compact QSFP-DD form factor enables high port density, ensuring scalable and future-ready networking for organizations managing heavy data traffic.
400G High-Speed Connectivity Supports ultra-fast data transfer rates to meet growing enterprise and service provider demands.
Long-Reach Performance Provides reliable connectivity up to 2km over single-mode fiber.
Compact QSFP-DD Design Enables dense, scalable deployments without requiring extra rack space.
Standards Compliance Fully compliant with QSFP-DD MSA and designed for seamless integration into Cisco systems.
Low Power Consumption Operates under 9W, reducing operational costs and heat generation in large deployments.
Data centers requiring ultra-high-speed backbone links.
Enterprise networks supporting cloud-scale workloads.
Service providers delivering scalable metro and core connectivity.
High-performance computing clusters demanding stable 400G links.
Condition: - Device has been extensively tested and is fully functional.
Brand: Cisco
Model: QDD-400G-FR4-S
Type: 400G QSFP-DD Optical Transceiver
Form Factor: QSFP-DD
Data Rate: 400Gbps
Wavelengths: 1271nm, 1291nm, 1311nm, 1331nm
Fiber Type: Single-Mode Fiber (SMF, G.652/9µm)
Connector: Duplex LC/UPC
Transmission Distance: Up to 2km
Transmitter Type: CWDM EML
Receiver Type: PIN
TX Power: -3.2 to +4.4 dBm
Receiver Sensitivity: -7.2 dBm
Receiver Overload: 4.4 dBm
Power Budget: 4 dB
Modulation (Electrical): 8 × 50G PAM4
Modulation (Optical): 4 × 100G PAM4
DSP: Integrated TX and RX
FEC: Not Inbuilt (Host-based FEC required)
DDM/DOM: Supported
Extinction Ratio: >3.5 dB
Power Consumption: 9W
Packaging Technology: COB
Operating Temperature: 0°C to 70°C (32°F to 158°F)
Warranty: 3 Month Carry-in Warranty
What's in the Box: 1 × Cisco QDD-400G-FR4-S Transceiver Module
