Description

Farsince 400GBASE‑DR4 is a QSFP112 hot‑pluggable optical transceiver designed for 400‑Gigabit Ethernet over single‑mode fiber. The module converts four 106.25G PAM4 electrical lanes from the QSFP112 host to four optical lanes at 1310 nm, using an MPO‑12/APC female receptacle (8 active fibers: 4Tx/4Rx). It supports point‑to‑point reaches up to 500 m on G.652D SMF and is suited for spine‑leaf fabrics, AI clusters, and migration paths from 100G to 400G. With an MTP‑to‑4×LC duplex harness, it can break out to four independent 100G‑DR links.

A DSP‑retimed EML/PIN optical engine with CMIS management provides stable operation and full digital diagnostics. The compact QSFP112 form factor enables high‑density panels, while hot‑swap serviceability simplifies maintenance. The optics interoperate to IEEE 400GBASE‑DR4 and require host KP4 FEC. Farsince supports multi‑vendor coding, custom labeling and test reports, and can supply matched MTP trunks and breakout harnesses for rapid, consistent deployment.

Specifications

• Product Type: 400GBASE‑DR4 QSFP112 optical transceiver
• Host Interface: QSFP112, 4×106.25G PAM4 (400GAUI‑4), CMIS
• Device Interface: MPO‑12/APC female (no pins)
• Optical Lanes: 4×TX / 4×RX parallel at 1310 nm
• Data Rate: 400G aggregate; supports 4×100G breakout
• Fiber Type: Single‑mode (G.652D)
• Reach: Up to 500 m
• Optical Engine: EML transmitters / PIN receivers
• Management: DOM/DDM digital diagnostics
• Power Consumption: Up to 10 W
• Host FEC: KP4 FEC required
• Operating Temperature: 0 to +70°C case
• Applications: Leaf‑spine, AI/HPC clusters, 400G to 4×100G migration
• Compatibility: IEEE 802.3bs 400GBASE‑DR4; electrical per IEEE 802.3ck; QSFP112 MSA
• Compliance: RoHS, REACH
• Customization: Coding, labeling, MTP‑to‑LC harnesses and trunk cabling