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400G QSFP112 DR4
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400G QSFP112 DR4

400G QSFP112 DR4

400G QSFP112 DR4 transceiver—4×100G PAM4 @ 1310 nm over MPO-12, up to 500 m on OS2 SMF; 400GAUI-4 electrical, CMIS management, low power, breakout-ready.

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The 400G QSFP112 DR4 is a 400 Gigabit Ethernet parallel-optics transceiver for short-reach single-mode links up to 500 m. It uses four 100G PAM4 lanes at ~1310 nm over MTP/MPO-12 (8 fibers active) and a 400GAUI-4 (4×112G PAM4) electrical interface—ideal for spine/leaf fabrics and 4×100G breakouts to TOR/aggregation switches.

  • Standards & Management

    • IEEE 802.3bs 400GBASE-DR4 compliance

    • Electrical interface: 400GAUI-4 (4×106.25 Gbps PAM4) with host KP4 FEC

    • CMIS 4.0+ management, DOM/DDM telemetry over 2-wire (I²C)

  • Optics & Reach

    • Wavelength: ~1310 nm parallel (4×100G PAM4)

    • Fiber/Connector: MTP/MPO-12, APC recommended

    • Reach: up to 500 m over OS2 SMF

  • Performance & Power

    • Typical power: ≤ 10 W (platform dependent)

    • Low BER with host KP4 FEC; PRBS/loopback test support

  • Reliability & Environment

    • Case temp: 0 to +70 °C (commercial); industrial options on request

    • RoHS/REACH compliant; laser Class 1 (IEC 60825-1)

  • Use Cases

    • 400G spine–leaf interconnects in data centers

    • 4×100G breakout (DR/FR) to access layers via MPO-to-LC harness/cassettes

    • Short-reach single-mode backbones within campuses and COs

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Our senior optical engineers leverage a mature portfolio of DCI/OTN platforms and CWDM/DWDM modules to deliver precise customization and form/fit/function matching. From compact DCI BOX to coherent 100G/200G/400G line cards, we meet multi-vendor interoperability targets (e.g., OpenZR+/OpenROADM) and tailor interfaces, protection, and O&M to your requirements.

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Accelerate your rollout with rapid cycles: lab configurations in 1–3 days, standard builds shipping in 3–7 days, and pilot-friendly MOQs (1 unit for in-stock models; ≥5 units for custom). Move fast, validate quickly, and scale without risk.

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