Arista QDD-400G-LR4 Compatible 400G QSFP-DD LR4 Optical Transceiver Module | HYTOPTODEVICE

This fiber transceiver is 100% compatible with Arista 400G routing and switching platforms that feature QSFP-DD ports. It seamlessly integrates into below platforms to utilize high speed 400G Network Transmission:

• Arista 7060X4 Series Data Center Switches:

  • DCS-7060PX4-3224 / DCS-7060DX4-32

• Arista 7280R3 Series Routing & Switching Platforms:

  • DCS-7280DR3-24 / DCS-7280CR3-32 / DCS-7280CR3K-32D

• Arista 7300X4 Series Modular Switches:

  • DCS-7300X4 line cards (e.g., DCS-7300X4-64D-LC)

• Arista 7800R3 Series High-Density Core Platforms:

  • DCS-7800R3 line cards (e.g., DCS-7800R3-36DM-LC / DCS-7800R3K-36DM-LC)

The Arista QDD-400G-LR4 is a premier, long-reach (10km) optical transceiver, designed for massive scale-out networks and high-density routing environments. Key applications include:

• Cloud and Hyperscale Data Centers: Connects tier-1 and tier-2 spine-leaf architectures to sustain heavy East-West traffic demands and AI/ML data distribution.

• Data Center Interconnect (DCI): Bridges geographic gaps between localized data center facilities up to 10km apart via high-throughput single-mode fiber links.

• Telecom & Service Provider Core Networks: Upgrades metropolitan backbones and cloud edge infrastructure to support high-density 400G line-rate data.

• High-Performance Computing (HPC): Provides low-latency, 400Gbps connectivity between massive storage arrays and computing clusters.

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







FAQ for 400G QSFP-DD Optical Transceiver Module       

Q1: What is the maximum transmission distance supported by the Arista QDD-400G-LR4? A1: This transceiver is engineered for long-reach transmission, supporting link lengths up to 10 kilometers (10km) over standard G.652 single-mode fiber (SMF).

Q2: What wavelengths does the QDD-400G-LR4 use? A2: It operates over a CWDM4 wavelength grid, splitting the 400G signal across four optical channels: 1271nm, 1291nm, 1311nm, and 1331nm.

Q3: What type of fiber connector and patch cable does this module require? A3: It features a standard duplex LC. You will need a single-mode duplex LC-to-LC fiber optic patch cable to establish the connection.

Q4: Which modulation technology does this transceiver utilize? A4: It uses advanced OIF 56G PAM4 (Pulse Amplitude Modulation 4-level) technology, converting 8 channels of 50Gbps electrical signals into 4 channels of 100Gbps optical signals.

Q5: Does the 400g optical module support Digital Diagnostics Monitoring (DDM/DOM)? A5: Yes. Real-time DDM/DOM is fully supported, allowing network administrators to monitor critical metrics such as optical launch/receive power, temperature, voltage, and laser bias current.

Q6:  Is Digital Optical Monitoring (DOM) supported on this Arista compatible module? A6: Yes. Full DOM/DDM is supported, allowing real-time monitoring of diagnostics like optical Tx/Rx power, operating temperature, laser bias current, and supply voltage directly via Arista EOS.

Q7: Can I plug a QDD-400G-LR4 module into a standard 100G QSFP28 port? A7: No. While QSFP-DD ports are backward-compatible with 100G QSFP28 optics, a 400G QSFP-DD module cannot physically fit or operate in a legacy QSFP28 port due to mechanical and electrical limitations.

Q8: Is Forward Error Correction (FEC) required for this module? A8: Yes. Per the IEEE 802.3bs standard, host platforms must enable KP4 FEC (Forward Error Correction) on the port to ensure low Bit Error Rates (BER) and link stability over the 10km distance.

Q9: Will using a third-party compatible module void my Arista hardware warranty? A9: No. Under consumer protection laws like the Magnuson-Moss Warranty Act, OEMs cannot void your system warranty simply for using third-party peripherals. Our modules are programmed with correct EEPROM signatures to avoid "Non-Arista transceiver" system warnings.

Q10: How do you guarantee the compatibility of this transceiver before shipping? A10: Each compatible QDD-400G-LR4 undergoes strict 100% hardware testing on original Arista equipments. Live video verification of compatibility and link tests can be provided before dispatch.
  
Q11:Is QDD-400G-LR4 hot-swappable?A11:Yes,HYTOPTODEVICE fiber transceiver modules are hot-pluggable, hot Pluggable QSFP-DD MSA Compliant.you can plug or unplug the optical module, while the device is powered on, without any damage

Q12:Why Choose HYTOPTODEVICE for QDD-400G-LR4?A12: High-Speed Optical Transceiver Manufacturer China HYTOPTODEVICE ensures that the QDD-400G-LR4 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.

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 100 Cisco-branded SFP+ with HYTOPTODEVICE equivalents across our spine layer — zero compatibility issues, 40% cost reduction."— Network Engineer of ISP, England

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：

Partial Test Demonstration：

Others: