NVIDIA Mellanox MFS4R12CB-015 QSFP+ Active Optical Cable, 15m: This is a 15-meter active optical cable (AOC) with QSFP+ connectors on both ends, designed for 40Gb/s point-to-point interconnect. The MFS4R12CB-015 supports InfiniBand QDR and FDR10 (40Gb/s) and 40GbE links over multi-mode fiber with VCSEL optics. This is a refurbished MPN-specific 15m cable — it is NOT a passive copper DAC and is NOT field-terminated. It is NOT a 40GBASE-SR4 transceiver pair with separate MPO patch cord.
Engineering Context. The MFS4R12CB-015 is a factory-terminated 850nm VCSEL-based AOC over OM3-class multi-mode fiber. It signals at 4×10Gb/s NRZ to deliver 40Gb/s aggregate, and its electrical interface is QSFP+ (SFF-8436). End-faces are sealed inside the QSFP+ housing, eliminating fiber cleaning failures common to discrete transceiver+patch-cord pairs.
Deployment & Use Cases. Used for top-of-rack to end-of-row trunks where 15m exceeds passive copper reach (typically 5–7m for 40GbE DAC), HPC compute-to-storage interconnect on InfiniBand QDR/FDR10 fabrics, and as inter-switch links between 40GbE Mellanox SwitchX/SwitchX-2 leaves and spines in mid-distance rows.
Technical Specifications.
- MPN: MFS4R12CB-015
- Cable type: Active Optical Cable (AOC), factory-terminated
- Connectors: QSFP+ to QSFP+ (SFF-8436)
- Length: 15 m
- Data rate: 40Gb/s aggregate (4 × 10Gb/s NRZ)
- Protocols supported: InfiniBand QDR, InfiniBand FDR10, 40GbE Ethernet
- Optics: 850nm VCSEL, multi-mode fiber
- Fiber type: MMF (OM3-class)
- Power: Bus-powered via QSFP+ host port
- Brand: NVIDIA Mellanox
Compatibility & Constraints. Works with NVIDIA Mellanox QSFP+ ports on ConnectX-2/3 adapters and SwitchX/SwitchX-2 switches at QDR (40Gb/s IB), FDR10 (40Gb/s IB), and 40GbE. This is FDR10 — it is NOT FDR (56Gb/s); for 56Gb/s FDR use the corresponding FDR AOC SKU. The cable is single-length (15m fixed); for other distances, use the appropriate length-specific MPN (-005, -010, -020, -030). Bend radius and pull tension limits apply — handle as fiber, not copper.
Why TES. Sourced and bench-tested by T.E.S IT-SOLUTIONS. Each AOC is link-tested end-to-end before shipment. Handling time 1–3 business days from our EU stock.