800G twin-port multimode optics technical selection questions
Technical evaluation questions with variant-specific scope and sources.
800G twin-port multimode optics technical selection questions
These questions are prepared from the cited technical documentation and clearly scoped owner inputs. They are not a measured frequency ranking. Keep the applicability line with each answer; do not transfer board, cooling, crypto, protocol, cable length or firmware facts between variants.
Is MMA4Z00-NS one 800G optical port?
Applicable canonical content subjects: 980-9I510-00NS00.
No. It is one OSFP module with two separate 400G optical ports, each using an MPO12/APC connector.
Public references
- MMA4Z00-NS 800Gb/s Twin-port OSFP, 2x400Gb/s Multimode 2xSR4, 50m | MMA4Z00-NS 800Gb/s Twin-port OSFP, 2x400Gb/s Multimode 2xSR4, 50m
- MMA4Z00-NS Overview
What fiber and reach are specified?
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It uses 850 nm multimode 2xSR4 optics. Product specifications give 30 m on OM3 and 50 m on OM4; confirm the actual system and firmware for the planned reach.
Public references
- MMA4Z00-NS 800Gb/s Twin-port OSFP, 2x400Gb/s Multimode 2xSR4, 50m | MMA4Z00-NS 800Gb/s Twin-port OSFP, 2x400Gb/s Multimode 2xSR4, 50m
- Specifications | MMA4Z00-NS 800Gb/s Twin-port OSFP, 2x400Gb/s Multimode 2xSR4, 50m
- Quantum-2 Firmware RN 31.2014.2170 LTS: Firmware Compatible Products
Can one optical port use a straight cable and the other a splitter?
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NVIDIA’s overview says no. Both connections must use the same straight-versus-splitter arrangement; compatible endpoint optics are separately required.
Public references
Can this finned module be treated as a DGX flat-top module?
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No. MMA4Z00-NS is the finned switch-side version. -NS-FLT and -NS400 are different products. New and Used website offerings also remain separate commercial records.
Public references
- MMA4Z00-NS 800Gb/s Twin-port OSFP, 2x400Gb/s Multimode 2xSR4, 50m | MMA4Z00-NS 800Gb/s Twin-port OSFP, 2x400Gb/s Multimode 2xSR4, 50m
- MMA4Z00-NS Ordering Information
How should detachable optical connectors be cleaned?
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Use a connector-appropriate fiber cleaning tool on both mating surfaces before connecting them. Keep protective caps when disconnected.
Public references
Is it safe to look into a connected optical port?
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No. Never look directly into an energized optical port or connected fiber; its infrared light can be invisible.