400G QSFP-DD DR4 Optical Transceiver Module Compatible Cisco QDD-400G-DR4-S | HYTOPTODEVICE

The HYTOPTODEVICE Cisco QDD-400G-DR4-S fiber optic transceiver is 100% verified for native recognition and performance on:

• Cisco Nexus 9000 Series: N9K-C9316D-GX, N9K-C9364C-GX, N9K-C9332D-GX2B.

• Cisco 8000 Series Routers: 8201-32FH, 8101-32FH, 8800-LC-36FH.

• Cisco NCS 5500/5700 Series: NCS-55A1-24H, NC57-18DD-SE.

• Cisco Catalyst 9000 Series: C9500-32QC (with 400G modules).

• Operating Systems: Seamlessly supported on Cisco NX-OS and IOS XR, enabling full Digital Optical Monitoring (DOM) without "unsupported transceiver" errors.

• Data Center Leaf-Spine Interconnect: The standard choice for connecting leaf and spine switches over single-mode fiber up to 500m.

• 4x100G Port Breakout: Use the HYTOPTODEVICE QDD-400G-DR4-S to split a single 400G port into four 100G-DR links, connecting high-density switches to 100G servers or legacy switches.

• High-Performance Computing (HPC): Providing low-latency, high-bandwidth 400G links for AI training clusters and large-scale compute pods.

• Single-Mode Infrastructure Migration: Transitioning from 100G PSM4 to 400G DR4 while leveraging existing parallel SMF MPO-12 cabling.

Connectivity Solutions(Applications) of 400G QSFP-DD Optical Module：








FAQ for 400G QSFP-DD Optical Transceiver Module

Q2:What is the maximum transmission distance of the 400G QSFP-DD DR4 transceiver?A:HYTOPTODEVICE QSFP-DD 400G DR4 module supports the maxium transmitting distance of up to 500m with MPO-12, OS2 SMF

Q3:What fiber connector is required for the HYTOPTODEVICE QSFP-DD-400G-DR4?A:The 400G QSFP DD DR4 module uses an MPO-12 connector with SMF.

Q4:Does the HYTOPTODEVICE QDD-400G-DR4-S require FEC?A:Yes. According to the IEEE 802.3db standard, Host KP4 FEC must be enabled on the Cisco switch port to achieve the 100m distance with a reliable Bit Error Rate (BER).

Q5:Does the HYTOPTODEVICE QSFP-DD-400G-DR4 support breakout to 100G?A:Yes, The 400G DR4 module operates by using 4 independent channels, each channel running at 100G PAM4. so the HYTOPTODEVICE QSFP-DD-400G-DR4 transceiver fully supports breakout applications to 4x 100G. You can use the QSFP-DD 400G DR4 to break out to 4 x 100G-DR  transceivers (such as Cisco QSFP-100G-DR-S) using an MPO-12 to 4xLC Duplex(UPC) SMF breakout cable.

Q6:Where to buy 400G QSFP DD DR4 optical transceiver?A:There are many factories that produce and sell 400G  fiber optic transceivers, but 400G optical transceiver manufacturer china HYTOPTODEVICE is the excellent provider: a source factory, fully controllable process, reliable performance, 100% compatible, sufficient inventory, fast delivery, and quick response.

Q7:Q: Why choose the HYTOPTODEVICE QSFP-DD-400G-DR4 over the DR8 version? A: The QSFP-DD-400G-DR4 version is designed for improved efficiency. It uses an MPO-12 connector (100G standard), while the QSFP-DD-400G-DR8 requires an MPO-16 connector. If you already have MPO-12 fiber installed, the HYTOPTODEVICE 400G DR4 is a more economical option.This will allow you to upgrade from 100G to 400G using the existing MPO-12 cabling.

Q8:Is the 400G QSFP-DD DR4 backward compatible with lower-speed modules,such as 100G?A: Yes. QSFP-DD 400G DR4 uses parallel fiber (MPO-12). Using an MPO-to-4xLC breakout cable, you can link it to four 100G-DR (PAM4) transceivers.

 Q9:How do HYTOPTODEVICE ensure 400G QSFP-DD DR4 module compatibility with network switch?A:Ensuring 100% compatibility, optical transceiver modules must be coded to match the switch's requirements. 400G Optical Transceiver Manufacturer China HYTOPTODEVICE was equipped with various high-speed switch,the brands include such as Cisco,NVIDIA,Arista,Juniper. highly professional in coding equipment for various brands to ensure they are recognized and running in your  device.
 
Q10:Is QDD-400G-DR4 hot-swappable?A:HYTOPTODEVICE fiber transceiver modules are hot-pluggable, hot Pluggable QSFP-DD MSA Compliant.you can plug or unplug the optical transceiver, while the device is powered on without damaging the hardware.

Q11:who makes the best 400g transceiver?A: 400G Optical Transceiver Manufacturer China HYTOPTODEVICE ensures that the QDD-400G-DR4 is coded and tested for full compatibility with major switch vendors (such as Cisco, Juniper, Arista, and huawei). They verify the EEPROM settings to ensure "plug-and-play" functionality without port-recognition errors.Power efficiency, thermal management, multi-vendor compatibility,fast delivery are HYTOPTODEVICE advantage and commitment.

Q12：Does it use MPO-12 or MPO-16？A:The 400G QSFP-DD DR4 uses MPO-12 connector. There are 4 transmit and 4 receive channels (8 fibers total). An MPO-12 connector is used, with the 4 middle fibers typically remaining unused.

Why Network Engineers Choose HYTOPTODEVICE

HYTOPTODEVICE has supplied over 5000,000 optical transceiver modules to data centers, ISPs, and enterprise networks across 100+ countries since 2011. Every module undergoes a 72-hour burn-in test and full DDM/DOM validation before shipment.

• 100% MSA-compliant modules with Cisco, Huawei,Dell,Juniper, and Arista compatibility
• ISO 9001:2015 certified manufacturing facility in Shenzhen
• Average lead time of 3–5 business days with DHL/FedEx express options
• Dedicated pre-sales engineering support for custom configurations
• Actual hardware,actual switches,actual results.we publish compatibility test video,eliminate compatibility anxiety. you can watch before you buy. 
• We can provide inspection and shipping videos to make you feel as if you are right here with the product.

"We replaced 200 Cisco-branded SFPs with HYTOPTODEVICE equivalents across our spine layer — zero compatibility issues, 40% cost reduction."— Network Architect, Tier-2 ISP, Germany

Quality Certification & Compliance：

 At HYTOPTODEVICE, our quality commitment is backed by industry-standard validations. From fiber optical transceiver manufacturing to final inspection, our processes ensure global compliance and reliability.

We adhere to rigorous standards for our SFP modules and network solutions:

• ISO 9001: Certified quality management and production consistency.

• CE & FCC: Fully compliant for seamless Global Market Access.

• RoHS: Committed to environmental responsibility and hazardous material control.

• Proven Reliability: Rigorous testing to reduce compliance risk and ensure safety.

Certified Quality. Global Standards. Guaranteed Performance.

Rigorous Industrial Product Testing：

   

100% 3rd Party Compatible：

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