• 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-ZRP-Arista | 400G ZR+ Transceiver, QSFP-DD DCO, >120km SMF, LC

QDD-400G-ZRP-Arista

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Description

The Arista QDD-400G-ZRP is a high-performance 400G coherent QSFP-DD DCO transceiver designed for long-haul data center interconnect and metro applications. Featuring OpenZR+ MSA compliance with C-band tunable DWDM wavelength support, this module delivers 400G throughput over distances exceeding 120km with amplification. Built with 7nm coherent DSP ASIC technology and supporting multiple modulation formats including DP-16QAM, it provides ultra-long-reach transmission with superior spectral efficiency for edge, core, and DCI deployments.

Features

OpenZR+ MSA compliant for multi-vendor interoperability
- 7nm coherent DSP ASIC with advanced digital signal processing
- C-band tunable DWDM wavelength across full ITU grid (50GHz/75GHz/100GHz spacing)
- Multi-rate support: 100G/200G/300G/400G on single module
- Coherent detection technology for enhanced sensitivity and lower BER
- Ultra-narrow linewidth tunable laser for superior spectral purity
- High-performance O-FEC (OpenROADM FEC) for extended reach
- Tunable transmit power for optimized DWDM network margin
- No inline chromatic dispersion compensation required
- Hot-swappable QSFP-DD form factor
- Real-time digital optical monitoring (DOM) via CMIS interface
- Support for point-to-point, star, and ring network topologies
- Low latency coherent transmission
- Commercial temperature range operation (0-70°C)

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: 100/200/300/400 Gbps multi-rate support
- Wavelength: C-Band tunable DWDM, 1528.77-1567.13nm (ITU grid)
- Transmission Distance: >120km amplified, up to 600km with external amplification
- Modulation: Coherent DP-16QAM (400G), DP-8QAM (300G), DP-QPSK (100G/200G)
- Connector: Duplex LC/UPC
- Fiber Type: Single-Mode Fiber (SMF)
- Power Consumption: Typical 22.5W maximum
- Operating Temperature: 0°C to 70°C (commercial)
- Standards Compliance: OpenZR+ MSA 2.0, OIF-400ZR-02.0, OIF-CMIS-05.2, QSFP-DD Hardware Rev6.3, IEEE 802.3-2018
- FEC: O-FEC (OpenROADM FEC) for enhanced reach
- Management: Digital Optical Monitoring (DOM/DDM) support
- Hot-pluggable: Yes

FAQs

Q: What is the difference between 400G ZR and ZR+ transceivers?
A: The ZR+ variant offers enhanced transmission distance beyond standard 400G-ZR, supporting >120km amplified reach (up to 600km with external amplification) versus ZR's typical 80-120km. ZR+ also provides more advanced modulation and coding technology with stronger DSP capabilities, making it ideal for ultra-long-distance metro and regional data center interconnect applications.

Q: Which Arista switches support the QDD-400G-ZRP transceiver?
A: The QDD-400G-ZRP is supported on Arista 7800R3 series, 7280R3 and 7280DR3 platforms, and 7368 chassis with specific port and airflow restrictions. Front-to-back airflow is typically required, and some platforms have temperature limits (35°C max ambient). Consult Arista's Transceiver Compatibility Guide for full platform support details and minimum EOS version requirements.

Q: Does this transceiver require external amplification?
A: External amplification (EDFA) is required for distances beyond approximately 40km unamplified reach. For metro and regional DCI applications spanning 120km+, optical amplification and/or Mux/Demux equipment is necessary. The module supports tunable transmit power for optimized system margin in DWDM networks.

Q: Is the QDD-400G-ZRP compatible with other vendor equipment?
A: Yes, the transceiver is designed for multi-vendor interoperability. It complies with OpenZR+ MSA and OIF standards, enabling interoperability with other standard-compliant coherent modules from different vendors in open networking ecosystems. The module supports point-to-point, star, and ring network topologies.

Q: What applications are best suited for this transceiver?
A: The QDD-400G-ZRP is optimized for long-haul data center interconnect (DCI), metro edge aggregation, regional network builds, and 400G DWDM applications. It's ideal for hyperscale data centers requiring high-bandwidth interconnection over extended distances without re-laying fiber infrastructure, and for IP-over-DWDM deployments without inline chromatic dispersion compensation.

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