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1. 8 optical channels, dual duplex LC connectors 2. Support 800G to 2x 400G-FR4 QSFP-DD application, no breakout cables required 3. 8x 106.25G PAM4 modulation 4. EML + PIN Laser 5. Max power consumption ≤17WSee more
Juniper QDD-2X400G-FR4-P (740-170960) Compatible 2x 400G FR4 QSFP-DD 800G transceiver module supports a max data rate of 850Gbps. It enables the fiber link of 2km over single-mode fiber (SMF) with dual duplex LC connectors. The 800 Gigabit Ethernet signal is carried over 4 wavelengths at 1271nm, 1291nm, 1311nm, and 1331nm. QSFPTEK manufactured 2x 400GBASE FR4 QSFP-DD complies with IEEE 802.3cu-2021, IEEE P802.3ck D3.0, QSFP-DD MSA HW Rev 6.01, CMIS Rev 5.0. DDM (digital diagnostics monitoring) function is supported on the 800G fiber optic transceiver to achieve real-time operating parameters monitoring. Adopting the Pulse-amplitude Modulation (PAM4) modulation, the FR4 QSFP-DD achieves 800 Gigabit Ethernet through 8x 106.25 PAM4 Retimed 2x400GAUI-4 C2M electrical interface. The 800G FR4 QSFP-DD is widely used for gigabit Ethernet, data centers, and 800G to 2x 400G applications.
Scenario 1: 800G to 800G Direct Connectivity
Scenario 2: 800G to 2x 400GE Connectivity

Utilize 8x electrial lanes and 8x optical lanes modulated at 100G PAM-4 per lane. On the output side, it convert 8x 106.25Gb/s electrical signal to 8x 106.25Gb/s optical signals. On the receiver side, it convert 8x 100Gb/s optical signal to 8x 100Gb/s electrical signals.

The QSFP-DD-800G-2FR4 module is designed with dual duplex LC connectors, while each connector can connect to a physically separate 400G FR4 module via an LC OS2 duplex single-mode fiber. This enables 800G to 2x 400G breakout links without the need for using breakout fiber optic cables.

Every module is quality tested for compatibility in the multi-brand switches environment, which guarantees flawless operations.

Every unit sold undergoes rigorous quality testing, to ensure compatibility in the target switch environment, guaranteeing perfect operation.

Every module is qualified through rigorous procedures and advanced equipment to ensure high-quality and reliable optical devices for you.


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Transceivers type QDD-2X400G-FR4-P | 2km | Dual Duplex LC/UPC
We used this module during the validation phase of a new 800G deployment. The testing process went smoothly, and the module provided the performance we expected during our evaluation. It helped us confirm the design before moving into a larger rollout.
Transceivers typeQDD-2X400G-FR4-P | 2km | Dual Duplex LC/UPC
CompatibleJuniper
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0
One thing that stood out was how easy it was to coordinate this purchase with the rest of our hardware order. The specifications were clearly presented, making it simple to confirm we were selecting the correct transceiver before placing the order.
Transceivers typeQDD-2X400G-FR4-P | 2km | Dual Duplex LC/UPC
CompatibleJuniper
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0
I appreciate that replacing or moving the module during maintenance is straightforward. The connector design and clear markings make it easy to identify the correct transceiver, even when working in a fully populated rack. That made routine maintenance much more convenient.
Transceivers typeQDD-2X400G-FR4-P | 2km | Dual Duplex LC/UPC
CompatibleJuniper
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0
The LC interface made cabling much easier in our existing setup. Installation was quick, and the link came up without any adjustments. It's a practical choice for our deployment.
Transceivers typeQDD-2X400G-FR4-P | 2km | Dual Duplex LC/UPC
CompatibleJuniper
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0
Recognized instantly by our Juniper gear. The 2x400G links have been stable over a 1km run with acceptable light levels. Exactly what we needed.
Transceivers typeQDD-2X400G-FR4-P | 2km | Dual Duplex LC/UPC
CompatibleJuniper
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0
Deployed these 2x400G FR4 optics for a campus interconnect. The LC ports feel solid, and optical power levels are within spec over a 1.5km run. No issues so far.
Transceivers typeQDD-2X400G-FR4-P | 2km | Dual Duplex LC/UPC
CompatibleJuniper
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0
This module was installed during our final project acceptance testing. Every required check was completed successfully on the first attempt, which helped us finish the handover on schedule. It's always reassuring when hardware performs exactly as expected.
Transceivers typeQDD-2X400G-FR4-P | 2km | Dual Duplex LC/UPC
CompatibleJuniper
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0
We purchased this module as part of a repeat order, and the experience was just as good as the first time. The product was exactly as described, arrived on schedule, and the consistency between batches makes it a supplier we can rely on for future projects.
Transceivers typeQDD-2X400G-FR4-P | 2km | Dual Duplex LC/UPC
CompatibleJuniper
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0
The order was dispatched quickly and reached us within the expected delivery window. Since this was for a scheduled installation, receiving the modules on time helped keep the project moving without any delays.
Transceivers typeQDD-2X400G-FR4-P | 2km | Dual Duplex LC/UPC
CompatibleJuniper
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0
Before placing the order, Talia patiently answered several questions about the module and recommended the most suitable option for our application. Communication was prompt, professional, and never felt rushed. It's always nice to work with someone who understands the products well.
Transceivers typeQDD-2X400G-FR4-P | 2km | Dual Duplex LC/UPC
CompatibleJuniper
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