GLOBALfiber QDD-400G-ER4 is a 400G QSFP-DD ER4 transceiver for extended single-mode connections between data centres and enterprise sites. It reaches up to 40 km with built-in PFEC, or 30 km with host KP4 FEC, using a duplex LC interface.
Available coding and compatibility
Available coding: Cisco, Generic. 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. For other coding requirements, contact salg@globalfiber.no.
Key specifications
| Specification | Details |
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| Product number | QDD-400G-ER4 |
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| Form factor | QSFP-DD |
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| Capacity | 400G |
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| Applications | 400G Ethernet; data centre interconnect; enterprise networking |
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| Power dissipation | 12 W maximum |
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| Reach and fiber | 2 m–30 km with host KP4 FEC; 2 m–40 km with built-in PFEC; single-mode fiber |
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| Nominal wavelength | 1310 nm nominal |
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| Optical connectors | Duplex LC |
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| Diagnostics | Digital optical monitoring (DOM/DDM) |
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Installation requirements
Select the FEC configuration for the required distance. Check link attenuation and receiver input limits before connecting the optical path.