GLOBALfiber QDD-400G-VR4 is a 400G QSFP-DD VR4 optical transceiver for short multimode links in data centres. It supports distances up to 30 m on OM3 or 50 m on OM4 fiber, with four 100G PAM4 optical lanes and built-in FEC.
Available coding and compatibility
Available coding: Arista, Cisco, Generic, Juniper, SuperMicro. Provide the equipment model, port configuration and software version so support can be checked. Available coding does not confirm compatibility with every model or operating mode. Ethernet coding does not establish InfiniBand support. For other coding requirements, contact salg@globalfiber.no.
Key specifications
| Specification | Details |
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| Product number | QDD-400G-VR4 |
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| Form factor | QSFP-DD |
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| Capacity | 400G; maximum aggregate line rate 425 Gb/s |
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| Applications | 400G Ethernet; 4 × 100G-VR applications; InfiniBand interconnects. Host, port mode and coding support required. |
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| Power dissipation | 9 W maximum |
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| Reach and fiber | Up to 30 m on OM3 / 50 m on OM4 multimode fiber |
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| Nominal wavelength | 850 nm |
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| Optical connectors | MPO-12/APC |
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| Diagnostics | Digital optical monitoring (DOM/DDM) |
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Installation requirements
Confirm the host interface, cooling arrangement and fiber polarity before installation. Check the intended port mode and FEC configuration at both ends of the link.