Choosing Optics and Cables from Both Endpoints
Check protocol, lanes, reach, fiber, and cooling together.
Record both endpoints
Write down each device, connector, protocol, and required link rate. OSFP, QSFP112, QSFP56, QSFP28, and QSFP-DD are not interchangeable merely because a speed label matches. For a breakout connection, establish the supported split mode and lane mapping first.
Choose medium and distance
Use the particular cable specification for supported copper reach. Compare DAC, ACC, and AOC separately. For optics, check SMF/MMF, wavelength, connector, APC/UPC polish, polarity, and insertion-loss budget. A nominal module reach is not a calculation for the installed fiber path.
Check physical details
Single-port and twin-port modules have different link counts. Finned, flat-top, RHS, and IHS forms must fit the host cooling design. Fiber assembly length and transceiver reach are separate fields. An ordering-code suffix is not a reliable substitute for an explicit length specification.
Keep the evidence
Record endpoint A module, cable, and endpoint B module with exact part numbers, length, and documentation. Validate link establishment, errors, and temperature before running workloads. Treat a family photograph as a reference unless the specific SKU has been visually confirmed.
Related products
These products are topic references, not a certified configuration. Verify exact part numbers and deployed software.
- NVIDIA MMS4X00-NM 800G OSFP Optical Transceiver
- NVIDIA MMA4Z00-NS 800(2x400)Gbps OSFP Optical Transceiver
- NVIDIA MMS1X00-NS400 400G QSFP112 Optical Transceiver
- NVIDIA MMA1Z00-NS400 400G QSFP112 Optical Transceiver
- NVIDIA MFP7E30-N003 MPO Fiber Cable 3 m
References
- NVIDIA Interconnect Structured Cabling Requirements for InfiniBand XDR/NDR and 400/800G ETH Solutions
- NVIDIA Cable Management Guidelines and FAQ
- MMS4X00-NM 800Gbps Twin-port OSFP 2x400Gb/s InfiniBand and Ethernet Single Mode 2xDR4 500m
- MCP7Y10-Nxxx 800Gbs Twin-port OSFP to 2x400G QSFP112 DAC Splitter 1-3m Product Specifications
- NVIDIA MFP7E30-Nxxx MPO-to-MPO Single-mode Fiber Cable Product Specifications