• Silver-colored arista H-D400-4Q100-1M sfp+ transceiver modules with blue handles and metallic connectors for 400g active DAC
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Arista

Arista QDD-400G-ZR-Arista | 400G ZR Transceiver, DWDM Tunable, 120km SMF, LC

QDD-400G-ZR-Arista

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Description

The Arista QDD-400G-ZR is a digital coherent QSFP-DD optical transceiver designed for high-performance data center interconnect applications. Supporting 400GBASE-ZR with C-band DWDM tunability, it delivers up to 40km unamplified or 120km amplified transmission over single-mode fiber via duplex LC connectors. This pluggable coherent optics solution eliminates the need for external transponders while providing enterprise-grade reliability for metro and long-haul DCI deployments.

Features

Digital coherent optics (DCO) integrated into QSFP-DD form factor
- C-band DWDM tunable wavelength for flexible network deployment
- Supports point-to-point 400GbE links over metro and regional distances
- Eliminates need for external DWDM transponders and line systems
- 7nm coherent DSP ASIC with ultra-narrow linewidth tunable lasers
- High-speed modulators and coherent receivers for optimal performance
- Hot-swappable QSFP-DD MSA-compliant module
- Compatible with OIF-400ZR and IEEE 802.3 standards for multi-vendor interoperability
- Digital diagnostics monitoring (DOM) for real-time performance visibility
- C-FEC forward error correction for enhanced signal integrity
- Plug-and-play deployment for simplified DCI network expansion
- Optimized for data center interconnect, metro aggregation, and edge applications
- Low power consumption compared to traditional transponder-based solutions

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

Form Factor: QSFP-DD (Quad Small Form-factor Pluggable Double Density)
- Data Rate: 400 Gbps
- Wavelength: C-band tunable (DWDM), coherent optics
- Modulation: DP-16QAM (Dual Polarization 16-Quadrature Amplitude Modulation)
- Transmission Distance: Up to 40km unamplified, up to 120km with EDFA amplification
- Fiber Type: Single-Mode Fiber (SMF), duplex
- Connector Type: Duplex LC/UPC
- Power Consumption: ≤18.5W typical
- Operating Temperature: 0°C to 70°C (commercial temperature range)
- Digital Diagnostics: DOM/DDM supported for real-time parameter monitoring
- Standards Compliance: OIF-400ZR, OIF-CMIS-05.2, QSFP-DD MSA, IEEE 802.3
- FEC: C-FEC (Concatenated Forward Error Correction)
- Application: Data center interconnect (DCI), metro, access, and core networks

FAQs

Q: What is the maximum transmission distance for the QDD-400G-ZR?
A: The QDD-400G-ZR supports up to 40km unamplified transmission and up to 120km when using EDFA amplification over single-mode fiber. It is designed for metro and regional data center interconnect applications.

Q: Which Arista platforms support the QDD-400G-ZR transceiver?
A: The QDD-400G-ZR is supported on specific Arista platforms optimized for high-power 400ZR QSFP-DD modules, including the 7280R3A series. Please consult Arista's 400ZR DCI Solution datasheet and transceiver compatibility guide for the complete list of supported platforms.

Q: What are the key benefits of using coherent 400ZR optics?
A: 400ZR coherent optics integrate DWDM functionality directly into the transceiver, eliminating external transponders and line systems. This reduces complexity, cost, power consumption, and rack space while enabling pluggable DCI solutions with tunable wavelengths for flexible network design.

Q: Is the QDD-400G-ZR compatible with other vendors' 400ZR modules?
A: Yes, the QDD-400G-ZR complies with OIF-400ZR and QSFP-DD MSA standards, enabling multi-vendor interoperability with other standards-compliant 400GBASE-ZR modules for open and flexible DCI deployments.

Q: What modulation format does the QDD-400G-ZR use?
A: The QDD-400G-ZR uses DP-16QAM (Dual Polarization 16-Quadrature Amplitude Modulation) with C-FEC for high-performance 400G transmission over DWDM networks. The module features tunable C-band wavelengths for flexible DWDM deployment.

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