The Dell 400G-Q56-DD-LR4 Compatible LINK-PP module is a high-performance 400G QSFP-DD optical transceiver engineered for demanding data communication environments. It translates eight channels of 53.125Gb/s electrical input into four lanes of 106.25Gb/s optical signals. Compliant with IEEE 802.3bs and QSFP-DD MSA standards, this hot-pluggable module features a single 3.3V power supply and low power consumption.
Dell Part Number
400G-Q56-DD-LR4
Vendor Name
LINK-PP
Max Data Rate
425Gbps
Form Factor
QSFP-DD
Wavelength
1271nm, 1291nm, 1311nm, 1331nm
Max Cable Distance
10km
Connector
Duplex LC
Media
SMF
Transmitter Type
CWDM EML
Receiver Type
PIN
Max Power Consumption
9.5W
Protocols
IEEE 802.3bs, QSFP-DD MSA
DDM/DOM
Supported
Operating Temperature Range
0°C to +70°C
Key Features of Dell 400G-Q56-DD-LR4 Compatible LINK-PP 425G QSFP-DD
This cutting-edge transceiver offers high integration, robust EMI resistance, and low power dissipation under 9.5W. It supports full-duplex aggregate transmission rates up to 400Gbps using high-efficiency PAM4 modulation. Its 400GAUI-8 electrical interface guarantees seamless host connectivity, while a two-wire serial interface provides comprehensive management access via CMIS 4.0.
The 400G-Q56-DD-LR4 optical module delivers an ideal combination of port density and bandwidth. It optimizes network infrastructure by leveraging advanced optical multiplexing, satisfying the escalating transmission demands of enterprise networks and modern cloud data centers.
400G-Q56-DD-LR4: 400G Connectivity for HPC Clusters
Tailored for High-Performance Computing (HPC) clusters and Infiniband interconnects, this 400G transceiver provides the ultra-high throughput and low latency required for intensive parallel computing workloads, heavy artificial intelligence processing, and massive data storage synchronization.
400G-Q56-DD-LR4 Module with CWDM Technology for Fiber Efficiency
By incorporating coarse wavelength division multiplexing (CWDM) technology, this transceiver consolidates four distinct lanes onto a single fiber. This architecture maximizes existing cable utility and significantly reduces total fiber infrastructure deployment costs.
400G-Q56-DD-LR4 Module with 1271nm, 1291nm, 1311nm, 1331nm Wavelength
Operating over four precise CWDM wavelengths—1271nm, 1291nm, 1311nm, and 1331nm—the module ensures stable optical channels. This specific spacing avoids signal overlap and maintains high signal integrity during multi-channel data routing.
Equipped with a highly sensitive receiver and robust transmitters, this transceiver achieves reliable long-haul data links up to 10km over single-mode fiber. It relies on Forward Error Correction (FEC) to guarantee error-free data delivery.
400G-Q56-DD-LR4 Module with Duplex LC Interface
Featuring an industry-standard duplex LC optical connector, the transceiver ensures a secure, low-insertion-loss physical connection. This standard interface facilitates straightforward integration with existing single-mode fiber patch cables and patch panels.
400G-Q56-DD-LR4 Module with DOM for Real-Time Monitoring
Integrated Digital Optical Monitoring (DOM) tracks vital operating metrics in real time. Network administrators can closely monitor transceiver temperature, supply voltage, laser bias current, and TX/RX optical power levels to prevent link failures.
The 400G-Q56-DD-LR4 transceiver undergoes rigorous certification processes. It fully complies with international environmental and telecommunication safety standards, guaranteeing safe, high-speed network performance.
Our comprehensive quality testing program subjects every single transceiver to strict component inspections, multi-stage hardware validation, and comprehensive traffic evaluations to ensure maximum out-of-the-box reliability.
400G-Q56-DD-LR4 Quality Certifications
This 400G optical module adheres strictly to strict global standards, including RoHS compliance for environmental safety, alongside standard CE, FCC, and IEEE telecommunication regulations.
This product is in conformity with ISO9001. This system is valid to a company engaging in development, production and supply service of fiber optical products. Please contact us to learn more.
ISO/IEC 27001 is an international standard for managing and processing information security. This standard is jointly developed by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). It sets out requirements for establishing, implementing, maintaining, and continually improving an information security management system (ISMS). Ensuring the confidentiality, integrity, and availability of organizational information assets, obtaining an ISO 27001 certificate means that the enterprise has passed the audit conducted by a certification body, proving that its information security management system has met the requirements of the international standard. Please contact us to learn more.
This product is in conformity with ISO14001.It is intended for use by an organization seeking to manage its environmental responsibilities in a systematic manner that contributes to the environmental pillar of sustainability. Please contact us to learn more.
ISO 45001 is a global standard that sets out the requirements for an occupational health and safety management system (OH&SMS).
REACH is a European Union regulation concerning the Registration, Evaluation, Authorization and Restriction of Chemicals. It came into force on 1st June 2007 and replaced a number of European Directives and Regulations with a single system. The regulation aims to protect human health and environmental safety, maintain and improve the competitiveness of the EU chemical industry, and develop innovative capabilities for non-toxic and harmless compounds to prevent market fragmentation, increase the transparency of the use of chemicals, promote non-animal experiments, and pursue sustainable social development.Please contact us to learn more.
This product meets the applicable requirements of Directive (EU) 2015/863 of RoHS. It restricts the use of 10 hazardous materials in the manufacture of various types of electronic and electrical equipment: lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, and four different phthalates. Please contact us to learn more.
This product fully accords with the FCC, which aims to manage the radio wave and magnetic fields more reasonably. Please contact us to learn more.
CB is an international system operated by IECEE. This product is based on IEC standards for testing the safety performance of electrical products. Please contact us to learn more.
This product fully accords with UKCA (UK Conformity Assessed) certificate, which signifies that it meets all relevant quality standards as well as health and safety requirements. Please contact us to learn more.
UL certification is a non-mandatory certification in the United States,mainly testing and certification of product safety performance.Its ultimate purpose is to obtain products with a fairly safe level for the market,and to contribute to ensuring human health and property safety.Please contact us to learn more.
400G-Q56-DD-LR4 Certified for Reliable Host-Device Compatibility
Engineered and certified to match the QSFP-DD MSA specification, this module guarantees seamless plug-and-play compatibility and hardware interoperability across switches, routers, and servers from major network vendors.
Every LINK-PP transceiver passes an exhaustive multi-step validation protocol. We test electrical and optical criteria under simulated network loads to assure peak stability.
Optical Spectrum Test
Central wavelength accuracy is validated across all four lanes, ensuring compliance with specified grid standards and side-mode suppression limits.
Eye Pattern Test
Transmitter optical waveform and PAM4 eye symmetry are analyzed to guarantee optimal signal quality and excellent extinction ratios.
Bit Error Rate Test
Every module undergoes pre-FEC bit error ratio testing to verify error-free 400G data transmission across maximum link distances.
Temperature Test
Thermal chambers stress the transceivers from 0°C to 70°C, verifying consistent electrical and optical stability under fluctuating environmental workloads.
Product Shipping for Dell 400G-Q56-DD-LR4 Compatible LINK-PP 425G QSFP-DD
Our streamlined logistics program guarantees that your high-speed transceivers are packed securely and delivered promptly. We safeguard every shipment from dispatch to final delivery.
Anti-Static Protective Packaging
Each module is sealed inside a premium, custom-fitted anti-static ESD bag to prevent electrical damage during handling.
Shock-Resistant Transport Protection
Shipments utilize dense, impact-absorbing foam enclosures and multi-layered exterior boxes to shield the delicate internal optics from transit vibrations.
Fast Order Processing and Dispatch
Our logistics team processes hardware orders rapidly, minimizing lead times and facilitating prompt warehousing turnaround for urgent network expansions.
Global Logistics and International Delivery
Leveraging tier-one international freight carriers, we provide reliable global shipping with end-to-end tracking to ensure your products arrive safely worldwide.
To deploy the module, insert it firmly into a compatible 400G QSFP-DD host slot until it clicks securely. Remove the dust plug and connect a duplex LC single-mode fiber patch cable, then verify link status via your network operating system.
400G-Q56-DD-LR4 Technical Support
LINK-PP provides professional technical support, including pre-sales consultation, compatibility verification, and post-deployment troubleshooting to ensure smooth network operation.
Pre-Sales Technical Consultation
Professional technical guidance to help customers select the most suitable 400G-Q56-DD-LR4 modules based on network architecture and application requirements.
Compatibility Verification Support
Compatibility checks and validation to ensure seamless operation with Cisco switches and other supported networking platforms.
Deployment & Installation Assistance
Step-by-step support for installation, configuration, and initial deployment to ensure stable and correct operation.
Long-Term Technical Assurance
Ongoing technical support throughout the product lifecycle to ensure reliable performance in enterprise and carrier-grade networks.
A:
Definitely! We fully support enterprise volume procurement. The cart automatically applies discounts for large orders, but for deployments of 100+ units, please hit up our B2B sales team directly for deeper net terms and customized quotes. By
admin on
2026-03-13
A:
Hi! Yes, absolutely. The LQD-CW400-LR4C is fully QSFP-DD MSA compliant with custom EEPROM coding available. It functions plug-and-play in Cisco Nexus environments natively without triggering any third-party block alerts. By
admin on
2025-11-29
A:
They seamlessly handle both! They are fully compliant with IEEE 802.3bs for Ethernet and strictly adaptable to 400G InfiniBand NDR protocol standards. They deliver the massive bandwidth and ultra-low latency required for heavy AI nodes and server backend networks. By
admin on
2025-08-25
A:
Your standard Duplex LC OS2 single-mode fiber (SMF) patch cables will work perfectly! This transceiver uses built-in CWDM technology to multiplex four wavelengths, running 400G over just two strands of fiber up to 10km. No MPO conversion required! By
admin on
2025-03-25
Procured 50 units for a commercial data center build-out. Complete QSFP-DD MSA compliance meant no vendor lock-in headaches. Optical DOM monitoring gives my IT admin team exact TX/RX power levels. Unbeatable ROI!
Please write comments with more than three
character.
494490
337718
K***s
Panama
Verified
Purchase
5 .0
2025-09-21
We did a massive batch deployment across our campus fiber network. These 400G LR4 transceivers pulled under 9.5W power, keeping our Cisco Nexus switches surprisingly cool. Fantastic DDM management and zero FEC errors!
Please write comments with more than three
character.
494490
337696
Ł***i
United Kingdom
Verified
Purchase
5 .0
2022-10-21
I have ordered 10 of these and my experience has been perfect. I used them in a combination of Meraki and Cisco switches and they have all performed perfectly.
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