The D-Link DEM-QX01Q-SR4 Compatible LINK-PP module is a premium 40G QSFP+ optical transceiver engineered for high-speed network connections. Operating at an 850nm wavelength, this high-performance module supports data center infrastructure with robust 40Gbps connectivity over multimode fiber. It integrates an MPO connector and advanced DOM capabilities, ensuring seamless commercial-grade performance and exceptional reliability.
D-Link Part Number
DEM-QX01Q-SR4
Vendor Name
LINK-PP
Form Factor
QSFP+
Max Data Rate
40Gbps
Wavelength
850nm
Max Cable Distance
300m
Connector
MPO-12
Media
MMF
Transmitter Type
VCSEL
Receiver Type
PIN
Protocols
IEEE 802.3 40GBASE-SR4, SFF-8436
Operating Temperature Range
0°C to +70°C
Key Features of D-Link DEM-QX01Q-SR4 Compatible LINK-PP 40G QSFP+
Discover the exceptional capabilities of the D-Link DEM-QX01Q-SR4 Compatible LINK-PP 40G QSFP+ transceiver. This innovative optical module utilizes top-tier VCSEL lasers and PIN receivers for maximum efficiency. It operates perfectly within commercial temperature ranges, providing low power consumption and robust signal integrity for demanding enterprise network environments.
Enhance your infrastructure with the D-Link DEM-QX01Q-SR4 Compatible LINK-PP 40G QSFP+ optical module. Engineered for scalability, this hot-pluggable transceiver delivers exceptional data transmission rates, making it an indispensable asset for modern high-density cloud computing architectures.
DEM-QX01Q-SR4: 40G Connectivity for Data Center Backup Links
Deploy the DEM-QX01Q-SR4 transceiver to establish resilient 40G connectivity for critical data center backup links. This high-speed QSFP+ module ensures rapid data replication, minimizing downtime and safeguarding your mission-critical operations with superior optical networking stability.
DEM-QX01Q-SR4 Module with 850nm Wavelength
Operating efficiently at an 850nm wavelength, the DEM-QX01Q-SR4 module features an advanced VCSEL laser array. This specialized 40G optical design optimizes short-reach multimode fiber communications, significantly reducing latency while maximizing overall network throughput and reliability.
DEM-QX01Q-SR4 Module Supporting 300m Transmission
Maximize your reach with the DEM-QX01Q-SR4 module supporting impressive 300m transmission distances over OM3 multimode fiber. This extended-reach capability makes the 40G transceiver ideal for connecting dispersed server racks within expansive enterprise data center facilities.
DEM-QX01Q-SR4 Module with MPO-12 Interface
The DEM-QX01Q-SR4 module utilizes an industry-standard MTP/MPO interface, enabling rapid deployment and secure physical connections. This multi-fiber connector perfectly accommodates the 40G QSFP+ architecture, simplifying cabling complexity while ensuring excellent optical return loss performance.
DEM-QX01Q-SR4 Module with DOM for Real-Time Monitoring
Featuring integrated Digital Optical Monitoring, the DEM-QX01Q-SR4 module empowers administrators with real-time diagnostic insights. Proactively track critical metrics like temperature, voltage, and laser power to guarantee continuous, error-free operation of your 40G QSFP+ network links.
The D-Link DEM-QX01Q-SR4 Compatible LINK-PP 40G QSFP+ module meets strict global regulatory standards. Its comprehensive compliance ensures maximum safety, environmental responsibility, and reliable operational continuity across regions.
Every DEM-QX01Q-SR4 optical transceiver undergoes a rigorous quality testing program. We validate each 40G module to ensure flawless performance and zero defects before it leaves the factory.
DEM-QX01Q-SR4 Quality Certifications
Backed by industry-recognized quality certifications, the DEM-QX01Q-SR4 transceiver fully complies with CE, FCC, UKCA, UL, and REACH standards, guaranteeing premium optical networking safety and sustainability.
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.
DEM-QX01Q-SR4 Certified for Reliable Host-Device Compatibility
The DEM-QX01Q-SR4 module is certified for reliable host-device compatibility. Each 40G QSFP+ transceiver is precision-coded to interoperate flawlessly with major mainstream data center switches and routers.
Our comprehensive evaluation process guarantees exceptional durability. Rigorous testing ensures reliable QSFP+ performance, delivering consistent high-speed data transmission under demanding networking conditions.
Optical Spectrum Test
The optical spectrum test verifies the precise 850nm center wavelength and transmission signal stability.
Eye Pattern Test
This essential eye pattern test confirms excellent signal integrity and minimal data transmission distortion.
Bit Error Rate Test
A thorough bit error rate test ensures flawless, packet-loss-free 40G data communications for networks.
Temperature Test
The temperature test validates stable optical operation across the standard commercial environmental thermal range.
Product Shipping for D-Link DEM-QX01Q-SR4 Compatible LINK-PP 40G QSFP+
We implement professional fulfillment procedures. The product shipping for D-Link DEM-QX01Q-SR4 Compatible LINK-PP 40G QSFP+ prioritizes secure handling and rapid dispatch for absolute customer satisfaction.
Anti-Static Protective Packaging
Specialized anti-static protective packaging shields sensitive components from electrical damage during daily transit.
Shock-Resistant Transport Protection
Durable shock-resistant transport protection prevents unexpected physical impacts from harming delicate optical transceivers.
Fast Order Processing and Dispatch
Our fast order processing and dispatch guarantee extremely rapid shipping turnarounds for buyers.
Global Logistics and International Delivery
Reliable global logistics and international delivery ensure commercial modules arrive safely worldwide.
Watch our comprehensive usage demonstration to see the D-Link DEM-QX01Q-SR4 Compatible LINK-PP 40G QSFP+ in action. This guide illustrates proper MPO cable insertion, seamless switch integration, and real-time DOM metric verification for optimal data center deployment success.
DEM-QX01Q-SR4 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 DEM-QX01Q-SR4 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:
Absolutely! The LQ-M8540-SR4C is extensively tested for multi-vendor interoperability and works perfectly with major brands like Cisco, Juniper, and Arista. MPO-12 connectivity and live DOM/DDM metrics will function smoothly across your mixed-switch deployment without any proprietary lock-ins. By
admin on
2026-04-17
A:
Yes, we do! For high-volume enterprise procurement, we offer significant tiered bulk discounts and flexible net terms to support your capital expenditure plans. Please reach out to our B2B sales team directly to get a custom quote for your 500-unit rollout. By
admin on
2026-03-04
A:
Yes, strictly compliant. The LQ-M8540-SR4C adheres to the SFF-8436 MSA standard, IEEE 802.3ba, and is fully RoHS certified. They meet all stringent global data center networking and safety standards, ensuring zero compliance friction for corporate enterprise deployments. By
admin on
2025-11-22
A:
To achieve the reliable 40Gbps speed and reach the maximum transmission distance (150m on OM3, 300m on OM4), you must use OM3 or OM4 multimode fiber with an MPO-12 connector. Legacy OM2 cables simply lack the bandwidth capacity required for 40G transmission over practical distances. By
admin on
2025-10-29
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491640
405479
C***s
Ukraine
Verified
Purchase
5 .0
2026-04-22
Deployed 50 MPO-12 40GBASE-SR4 modules for a 40G NAS cluster. VCSEL laser power is excellent, staying well within 0-70C limits. Unbeatable Total Cost of Ownership for enterprise B2B networks.
Please write comments with more than three
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491640
405486
L***s
Republic of Korea
Verified
Purchase
5 .0
2025-01-10
Excellent compatibility! I was skeptical about mixing them in a multi-brand environment, but they synced seamlessly with our HPE Aruba and Extreme networks. Perfect 40Gbps backhaul solution for campus networking.
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491640
405485
c***t
France
Verified
Purchase
5 .0
2025-01-08
I recommend this company to everyone, it's much better than expected, no matter its modules or services. Rachel, my consultant, is very helpful, and update me every steps in this purchasing process. When I received my Optical Transceiver Module I had ordered, it was well packaged and worked fine with my switch. If possible, I will buy all my fiber products in l-p.com.
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491640
405462
Z***a
Brunei Darussalam
Verified
Purchase
5 .0
2023-11-24
Well-designed, Fast, clear website made it extremely easy to order, which I appreciated very much. I have always had a wonderful experience at l-p.com. The professional staff here has always been able to help answer questions. Thanks guys.
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491640
405470
T***i
Italy
Verified
Purchase
5 .0
2023-08-14
The staff at l-p.com was extremely helpful and responsive. I greatly appreciated their expertise and guidance as I ordered the 1000BASE-T 10/25/40G Transceiver Modules. I could not have asked for a better experience. Thank you. I will shop again and I will recommend.
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491640
405463
T***r
Canada
Verified
Purchase
5 .0
2023-05-30
Had an issue with the post office loosing the shipment. Wrote to Link-pp and the went into action. They sent me a new order without questions and kept in touch with me till the issue was resolved. Thank you.
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