400GBASE-FR4 Explained: Specs, Architecture, and Uses
LINK-PP Official Store
·
March 10, 2026
Learn what 400GBASE-FR4 is, how it works, its CWDM4 wavelength design, specs, transmission distance, and how it compares with other 400G optical standards.
QSFP-DD 400G Products
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Generic QDD-LR8-400G Compatible LINK-PP 400G QSFP-DD LAN-WDM 1310nm 10km DOM Duplex LC SMF Optical Transceiver Module $ 3,783.12 ~ 4,299.005 ★ 12 Reviews | 2.1K Sold -
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Cisco QDD-400G-LR8-S Compatible LINK-PP 400G QSFP-DD LAN-WDM 1310nm 10km DOM Duplex LC SMF Optical Transceiver Module $ 3,783.12 ~ 4,299.004.9 ★ 14 Reviews | 2.1K Sold -
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FS QDD-LR8-400G Compatible LINK-PP 400G QSFP-DD LAN-WDM 1310nm 10km DOM Duplex LC SMF Optical Transceiver Module $ 3,783.12 ~ 4,299.004.9 ★ 14 Reviews | 2K Sold -
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Juniper QDD-400G-LR8 Compatible LINK-PP 400G QSFP-DD LAN-WDM 1310nm 10km DOM Duplex LC SMF Optical Transceiver Module $ 3,783.12 ~ 4,299.005 ★ 17 Reviews | 1.9K Sold -
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NVIDIA/Mellanox QDD-LR8-400G Compatible LINK-PP 400G QSFP-DD LAN-WDM 1310nm 10km DOM Duplex LC SMF Optical Transceiver Module $ 3,783.12 ~ 4,299.004.9 ★ 18 Reviews | 1.9K Sold -
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Dell QDD-LR8-400G Compatible LINK-PP 400G QSFP-DD LAN-WDM 1310nm 10km DOM Duplex LC SMF Optical Transceiver Module $ 3,783.12 ~ 4,299.004.9 ★ 17 Reviews | 1.9K Sold -
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LINK-PP LQD-LW400-LR8C 400G QSFP-DD LAN-WDM 1310nm 10km DOM Duplex LC SMF Optical Transceiver Module $ 3,783.12 ~ 4,299.005 ★ 24 Reviews | 1.9K Sold -
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H3C QSFPDD-400G-LR8-WDM1300 Compatible LINK-PP 400G QSFP-DD LAN-WDM 1310nm 10km DOM Duplex LC SMF Optical Transceiver Module $ 3,783.12 ~ 4,299.004.9 ★ 15 Reviews | 1.9K Sold -
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Generic QDD-SR8-400G Compatible LINK-PP 400G QSFP-DD 850nm 100m DOM MPO-16/APC MMF Optical Transceiver Module $ 165.44 ~ 188.005 ★ 12 Reviews | 1.9K Sold -
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HPE Aruba S3N93A Compatible LINK-PP 400G QSFP-DD 8 x 50G PAM4 1310nm 500m MPO-12/APC DOM SMF Optical Transceiver Module $ 492.80 ~ 560.004.9 ★ 20 Reviews | 1.7K Sold
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