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1. PAM4 modulation technology. 2. CWDM EML + PIN, Duplex LC connector. 3. Low power consumption ≤12W. 4. 400GAUI-8/CEI-56G- VSR- PAM4, four CWDM optical lanes 5. Applied in 400G Ethernet, Infiniband interconnects, DCI, etc.See more
Cisco Compatible QDD-400G-FR4-S delivers a max link length of 2km over single-mode fiber (SMF) with a duplex LC connector. The 400GBASE-FR4 transceiver is designed with a QSFP-DD form factor, which provides the industry's highest bandwidth of 400 Gigabit Ethernet (400GbE). The total 400G signal is carried over four CWDM grid optical wavelengths with a data rate of 106.25Gbps (PAM4) per channel. On the transmitter side, the FR4 converts the 8 lanes of 50G PAM4 electrical signals into 4 channels of CWDM optical signals, then Multiplex them into a single 400G signal. On the receiver side, the module will demultiplex the 400G input signal into 4 lanes of CWDM optical signals and convert them into 8 channels of 50G PAM4 electrical signal as output.
The QSFP-DD 400G modules are compliant with IEEE 802.3bs for 400GBASE-FR4 specification and 100G Lambda MSA, and 400GAUI-8/CEI-56G-VSR-PAM4 standards. This 400G QSFP-DD FR4 module has wide adoption in data center interconnect (DCI), 400G Ethernet, Infiniband interconnects, enterprise networking, etc.


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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Compatible Cisco
Transceivers type QDD-400G-FR4-S | 2km | Duplex LC/UPC
The FR4 option gave us a useful middle ground for this deployment. We had enough transmission distance for the planned links without having to over-spec the optics, which made the final design more practical.
Transceivers typeQDD-400G-FR4-S | 2km | Duplex LC/UPC
CompatibleCisco
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From an engineering perspective, this 400G FR4 module was easy to integrate into our existing environment.
Transceivers typeQDD-400G-FR4-S | 2km | Duplex LC/UPC
CompatibleCisco
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We chose this FR4 module for a data center interconnect project where balanced performance and simplicity were both important. The design matched our network requirements well and helped us keep the deployment straightforward without adding unnecessary complexity.
Transceivers typeQDD-400G-FR4-S | 2km | Duplex LC/UPC
CompatibleCisco
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These modules offer a great balance between performance and cost. They provide the high bandwidth required for modern data center applications while maintaining reliable optical performance and easy integration into existing fiber networks.
Transceivers typeQDD-400G-FR4-S | 2km | Duplex LC/UPC
CompatibleCisco
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I was impressed with the customer support, they did answer each qustion patiently and professionally.
Transceivers typeQDD-400G-FR4-S | 2km
CompatibleCisco
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The 400G FR4 can run normally when plugged into NCS1K4-2-QDD-C-K9, no compatibility problem. The transmission is stable without any lag. It is very safe to use and the price is affordable. I will continue to repurchase.
Transceivers typeQDD-400G-FR4-S | 2km
CompatibleCisco
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