Extreme Networks 400G-LR4-QSFPDD10KM Compatible QSFP-DD LR4 400G PAM4 1310nm 10km DOM Duplex LC/UPC SMF Optical Transceiver Module

The CT-400G-QDD-LR4 from Carritech Optics is a QSFP-DD LR4 transceiver module designed for 400GBASE-LR4 applications, supporting data rates up to 400Gbps. Utilising a CWDM4 laser and PIN receiver, it enables reliable transmission over single-mode fiber (SMF) up to 10 kilometers. It operates with an 8×53.125Gbps PAM4 electrical interface (400GAUI-8) and features integrated digital diagnostic monitoring through an I2C interface. The module is compliant with QSFP-DD CMIS rev4.0, IEEE 802.3cu, and QSFP-DD MSA hardware standards, with RoHS compliance under EU Directive 2015/863/EU. The transceiver operates within a 0°C to 70°C case temperature range and consumes a typical power of 12W.

Designed for data center and cloud networking applications, the module provides precise optical performance with a wavelength range spanning 1264.5nm to 1337.5nm across four lanes. It delivers high extinction ratios, consistent signal strength, and robust operational reliability. The CT-400G-QDD-LR4’s QSFP-DD MSA package with an LC duplex connector ensures easy integration and scalability for modern high-speed optical networks.

The CT-400G-QDD-LR4 is a hot-pluggable QSFP-DD optical module designed for 400GBASE-LR4 Ethernet. It delivers 400 Gb/s aggregate bandwidth via 8×53.125 Gb/s PAM4 electrical lanes (400GAUI-8) mapped into 4 CWDM optical channels (1271–1331 nm). The module supports transmission up to 10 km on G.652 SMF with host FEC, consumes ~12 W, and provides integrated digital diagnostics monitoring (DDM) accessible via I²C.

Key specifications

• Form factor / standards: QSFP-DD MSA; IEEE 802.3cu 400GBASE-LR4; CMIS rev4.0 compliant.
• Data rate: 400 Gb/s (8×53.125 Gb/s PAM4 lanes).
• Reach: Up to 10 km on G.652 SMF (with FEC).
• Optical wavelengths (CWDM4 grid): 1271, 1291, 1311, 1331 nm.
• Connector: Duplex LC.
• Power consumption: ~12 W (max 3.45 A @ 3.3 V).
• Supply voltage: 3.13–3.47 V.
• Operating case temp: 0 °C to 70 °C.
• Diagnostics: I²C interface with integrated DDM (temperature, voltage, bias, TX/RX power).
• Compliance: IEEE 802.3cu, QSFP-DD MSA, EU 2015/863/EU RoHS.

Optical characteristics (per lane unless noted)

• 400GBASE-LR4 Ethernet links up to 10 km on SMF.
• Cloud and data center interconnects (DCI) needing medium-long reach optics.
• High-capacity metro and enterprise backbones.

Carritech Optics can offer a fully compatible, high-quality alternative to Extreme Networks 400G-LR4-QSFPDD10KM.

Carritech part number: CT-400G-QDD-LR4

• QSFP-DD hot-pluggable form factor with duplex LC.
• CWDM4 lasers with PIN receivers for 10 km transmission.
• Supports 400GBASE-LR4 Ethernet over G.652 SMF.
• Integrated DDM via I²C for real-time monitoring.
• Power consumption ~12 W with +3.3 V supply.
• Compliant with IEEE 802.3cu, CMIS 4.0, and RoHS.

At Carritech, we pride ourselves on our exceptional service and commitment to meeting our customers’ needs. Our extensive range of SFP transceivers, including the 400G-LR4-QSFPDD10KM, is designed to cater to various requirements, ensuring that you receive the best solutions for your projects. We understand the importance of timely delivery, and our efficient processes are geared towards providing you with the products you need as quickly as possible. Our dedicated team works tirelessly to ensure that your orders are processed and dispatched promptly, so you can rely on us for swift and reliable service.

We recognise that every project is unique, and our flexible approach allows us to adapt to your specific needs. Whether you require immediate delivery or have more complex requirements, we are here to support you every step of the way. Our commitment to customer satisfaction means that we go above and beyond to ensure that you receive your SFP transceivers in a timely manner, without compromising on quality. Trust Carritech to deliver the solutions you need, when you need them.

At Carritech Optics, we stand by the quality and reliability of our optical transceivers. That’s why we proudly offer a lifetime warranty on all products as a testament to our commitment to excellence and customer satisfaction.

What Does Our Lifetime Warranty Cover?

Our lifetime warranty provides comprehensive coverage for the entire lifecycle of your optical transceivers, ensuring you experience complete peace of mind when choosing Carritech Optics. The warranty covers:

• Defects in Materials and Workmanship: If your product experiences any issues related to manufacturing or materials, we’ll repair or replace it free of charge.
• Performance Assurance: Our optical transceivers are rigorously tested to meet industry standards, and we guarantee they’ll perform as expected in your network environment.

Easy Claims Process

Should you ever need to make a warranty claim, our team is here to assist you. Simply contact our support team with your product details, and we’ll guide you through a quick and hassle-free process to resolve the issue.

Your Network’s Performance, Guaranteed

Carritech Optics is dedicated to providing high-quality optical solutions that you can trust for the long haul. With our lifetime warranty, you can confidently invest in our products, knowing that we’re with you every step of the way.