Arista QDD-400G-VSR4 – QSFP-DD VSR4 Optical Transceiver

About Arista QDD-400G-VSR4 QSFP-DD VSR4 Optical Transceiver in Bangladesh

The Arista QDD-400G-VSR4 is a high-speed 400Gbps Ethernet optical transceiver designed for very short-reach connectivity in modern data center, AI, cloud, and high-performance computing networks. Using the QSFP-DD form factor and 400G VSR4 optical architecture, it provides high-density 400GbE connectivity over compatible multimode fiber.

The transceiver uses four parallel optical lanes, with each lane carrying 100Gbps using PAM4 signaling, to deliver an aggregate 400Gbps optical connection. Operating in the 850nm-class optical band, the module is optimized for very short-distance multimode fiber links inside high-density data center environments.

The QDD-400G-VSR4 uses an MPO-12 APC optical connector and is designed for very short-reach applications such as intra-rack connectivity, adjacent-rack links, switch-to-switch connections, and high-bandwidth AI and GPU networking. The exact supported distance depends on the optical implementation, fiber grade, connector quality, and host equipment.

Arista QDD-400G-VSR4 QSFP-DD VSR4 Optical Transceiver Specifications & Overview

Overview

The Arista-compatible QDD-400G-VSR4 provides 400Gbps optical Ethernet connectivity through a high-density QSFP-DD interface. It is designed for networking environments where extremely high bandwidth is required across very short multimode fiber distances.

The 400G VSR4 architecture uses four parallel optical lanes, each carrying 100Gbps using PAM4 modulation. The four lanes combine to provide an aggregate 400Gbps optical connection while maintaining a compact pluggable form factor.

Operating at an 850nm-class optical wavelength, the transceiver is optimized for short-distance multimode fiber connectivity. Its very-short-reach design makes it particularly suitable for intra-rack and adjacent-rack connections where the optical path is relatively short.

The module uses an MPO-12 APC optical interface. Correct APC connector type, fiber polarity, lane mapping, multimode fiber grade, and host-device compatibility must be verified before deployment.

Buy Arista QDD-400G-VSR4 QSFP-DD VSR4 Optical Transceiver in Bangladesh

Purchase the Arista-compatible QDD-400G-VSR4 QSFP-DD VSR4 Optical Transceiver from Datacom Technologies (BD). We supply high-speed optical transceivers, Arista-compatible networking optics, Ethernet switches, routers, servers, storage, fiber connectivity products, and data center infrastructure with competitive pricing, technical consultation, deployment assistance, and nationwide delivery throughout Bangladesh.

Compatibility

• Compatible Arista 400GbE Networking Platforms Supporting VSR4
• Arista QSFP-DD 400G Interfaces
• 400GbE Data Center Switching Platforms
• AI and GPU Networking Infrastructure
• High-Performance Computing Networks
• Compatible 400G VSR4 Optical Interfaces
• Multimode Fiber Infrastructure
• MPO-12 APC Fiber Cabling

Always verify the exact transceiver vendor, host switch model, EOS/firmware support, supported optics list, port configuration, power requirements, connector type, fiber polarity, and cabling requirements before deployment.

Applications

• 400GbE Data Center Networking
• AI Cluster Networking
• GPU Infrastructure
• High-Performance Computing
• Intra-Rack Connectivity
• Adjacent-Rack Connectivity
• Switch-to-Switch Connectivity
• Leaf-to-Spine Connectivity
• Cloud Infrastructure
• Very Short-Reach Multimode Fiber Links

Benefits

• 400Gbps high-speed Ethernet connectivity
• High-density QSFP-DD form factor
• 4 × 100G parallel optical lane architecture
• PAM4 optical modulation
• 850nm-class multimode optical transmission
• MPO-12 APC optical interface
• Optimized for very short-reach connections
• Ideal for high-density data center networking
• Suitable for AI, GPU and HPC infrastructure
• Efficient solution for short 400GbE optical links

Why Buy from Datacom Technologies (BD)?

Datacom Technologies (BD) supplies enterprise networking and data center products in Bangladesh, including high-speed optical transceivers, Arista-compatible networking optics, Ethernet switches, routers, servers, storage, and fiber connectivity solutions. Customers can get competitive pricing, technical consultation, deployment assistance, and after-sales support.

• Call/WhatsApp: +8801748173213
• Email: sales@datacom.com.bd
• Alternative Email: datacomtechnologiesbd@gmail.com
• Office: Tropical Center, 218, Dr. Kudroti Khuda Road, New Elephant Road, Dhaka-1205, Bangladesh

Frequently Asked Questions (FAQ)

Q1: What is the data rate of the Arista QDD-400G-VSR4?
The QDD-400G-VSR4 is designed for 400Gbps Ethernet connectivity using four parallel 100Gbps optical lanes.

Q2: What does VSR4 mean?
VSR4 refers to a Very Short Reach optical architecture using four parallel optical lanes. In a 400G implementation, each lane carries 100Gbps using PAM4 signaling.

Q3: What form factor does the QDD-400G-VSR4 use?
It uses the QSFP-DD form factor, providing high bandwidth and high port density for modern networking platforms.

Q4: What type of fiber does the QDD-400G-VSR4 use?
The VSR4 architecture is designed for multimode fiber (MMF).

Q5: What wavelength does the QDD-400G-VSR4 use?
The transceiver operates in the 850nm-class optical band.

Q6: What is the reach of the QDD-400G-VSR4?
VSR4 is designed for very short-reach applications. The exact supported distance depends on the module implementation, fiber grade, optical budget, connectors, and host equipment.

Q7: What connector does the QDD-400G-VSR4 use?
The module uses an MPO-12 APC optical connector.

Q8: Is the QDD-400G-VSR4 suitable for AI and GPU networking?
Yes. Its 400Gbps bandwidth and very-short-reach architecture make it suitable for high-density AI, GPU, HPC, and data center networking applications where the optical path is short.

Q9: What is the difference between 400G VSR4 and 400G SR8?
Both are designed for short-reach multimode networking, but VSR4 uses four 100G optical lanes, while SR8 uses eight 50G optical lanes. The two architectures also use different optical connector configurations.

Q10: Is every QSFP-DD port compatible with the QDD-400G-VSR4?
No. The host platform must support the required 400GbE optical module, electrical interface, power and thermal requirements, firmware, and transceiver coding. Always verify compatibility before deployment.

Q11: Can MPO-12 APC be connected directly to MPO-12 UPC?
No. APC and UPC connector types should not be mixed. The correct MPO-12 APC cabling and polarity must be used for compatible VSR4 deployments.

Q12: Where can I buy the QDD-400G-VSR4 in Bangladesh?
You can contact Datacom Technologies (BD) for 400G QSFP-DD optical transceivers and Arista-compatible networking optics with competitive pricing, technical consultation, and nationwide delivery.