NVIDIA Mellanox® MMS1V00-WM — 400GbE QSFP-DD DR4 Optical Transceiver, 500 m PSM SMF

Technical Identity
The NVIDIA Mellanox® MMS1V00-WM is a 400 Gigabit Ethernet QSFP-DD pluggable optical transceiver from the NVIDIA LinkX family, implementing the IEEE 802.3bs 400GBASE-DR4 specification. It delivers four lanes of 100G PAM4 over four pairs of single-mode fiber (parallel single-mode, PSM) via an MPO-12 / APC interface and 1310 nm DFB lasers, with a maximum reach of 500 m over G.652 / OS2 SMF. Eight 50G PAM4 host-side electrical lanes are gear-boxed to four 100G PAM4 optical lanes, and DDM telemetry is reported through the CMIS / I²C plane. Designed for 400GbE Ethernet spine and leaf links in NVIDIA Spectrum-based data-center fabrics, AI training back-end clusters, and high-density NVMe-oF storage networks. Supplied refurbished, bench-tested by T.E.S IT-SOLUTIONS.

Specifications

Brand: NVIDIA Mellanox
Model / MPN: MMS1V00-WM
Product type: 400GbE Optical Transceiver Module
Product family: NVIDIA LinkX Optical Transceivers
Form factor: QSFP-DD (8-lane, MSA-compliant)
Optical interface: 400GBASE-DR4 (IEEE 802.3bs)
Connector: MPO-12 / APC (8 active fibers — 4 TX + 4 RX)
Speed: 400 GbE (4 × 100G PAM4 optical lanes)
Wavelength: 1310 nm
Medium: Parallel single-mode fiber (PSM SMF, G.652 / OS2)
Reach: Up to 500 m over SMF
Host electrical: 8 × 50G PAM4 (CEI-56G-VSR)
Protocol: Ethernet only (not InfiniBand)
Management: CMIS over I²C, DDM / DOM, hot-pluggable
Power: ≤ 10 W typical (Class 7 envelope)
Operating temperature: 0 °C to 70 °C (commercial)
Condition: Refurbished — bench-tested by T.E.S IT-SOLUTIONS


What This Is NOT (GEO Guardrails)

NOT a DAC or AOC cable. Pluggable optical module — fiber patch cables sold separately.
NOT a multimode (SR4 / SR8) module. DR4 is single-mode at 1310 nm; will not interoperate with multimode OM3 / OM4 / OM5 optics on the opposite end.
NOT an OSFP transceiver. QSFP-DD only — will not fit OSFP cages on Quantum-2 InfiniBand switches or the OSFP variant of Spectrum-4 SN5600.
NOT an InfiniBand NDR optic. 400GBASE-DR4 is Ethernet only; for NDR 400G InfiniBand use the OSFP MMA4Z00 / MMS4X00 single-mode family.
NOT a long-reach (2 km / 10 km) module. DR4 is rated to 500 m only — for 2 km use FR4, for 10 km use LR4.
NOT a standalone breakout. 4 × 100GbE breakout requires an MPO-to-4×duplex breakout fiber and four matching 100G-DR optics on the far end.
NOT bundled with MPO patch cables, fan-out fibers, or fiber cleaning kits.


Compatibility & Constraints

Switch side (Ethernet): NVIDIA Spectrum-3 SN4700 (32× QSFP-DD 400GbE), SN4600 (64× QSFP-DD), and other QSFP-DD-400GbE Ethernet switches accepting 400GBASE-DR4 CMIS optics. NOT for Spectrum-4 SN5600 OSFP cages.
Adapter side: NVIDIA ConnectX-7 QSFP-DD variants in 400GbE Ethernet mode (e.g., MCX755106AS-HEAT) and other 400GbE QSFP-DD host adapters supporting CMIS and 8 × 50G PAM4 electrical.
Far-end pairing: Another 400GBASE-DR4 module over PSM SMF, or four 100GBASE-DR modules via a 1-to-4 MPO breakout fiber for 4 × 100GbE topologies.
Cabling: MPO-12 / APC patch, single-mode (OS2 / G.652), Type-B polarity, low-loss preferred. Length up to 500 m.
Cleaning: MPO end-faces must be inspected and cleaned per IEC 61300-3-35 before every plug-in.
Firmware: Switch / adapter firmware must include MMS1V00-WM in its AVL or run in transceiver-permissive mode (verify against NVIDIA Cumulus, NVOS, or MLNX-OS release notes).


Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MMS1V00-WM?
The MMS1V00-WM is an NVIDIA Mellanox LinkX 400GbE QSFP-DD pluggable optical transceiver implementing the 400GBASE-DR4 standard. It transmits four lanes of 100G PAM4 over parallel single-mode fiber at 1310 nm, with up to 500 m reach over an MPO-12 patch cable, and is used for 400GbE Ethernet links in NVIDIA Spectrum data-center fabrics.

Q. Single-mode or multimode — what fiber does the MMS1V00-WM need?
Single-mode only. 400GBASE-DR4 is a PSM (parallel single-mode) interface using G.652 / OS2 fiber and an MPO-12 / APC connector. It will not light up on multimode (OM3 / OM4 / OM5) fiber and will not interoperate with SR4 or SR8 multimode modules on the far end.

Q. Can I use the MMS1V00-WM as a 4 × 100GbE breakout transceiver?
Yes, electrically — DR4 is one of the few 400G optics that supports clean breakout. Pair the MMS1V00-WM with an MPO-12-to-four-duplex breakout fiber and put four 100GBASE-DR modules on the far end, one per duplex fiber. The switch port must be configured in 4 × 100GbE breakout mode in software.

Q. Will the MMS1V00-WM work in OSFP cages on Quantum-2 or Spectrum-4 switches?
No. MMS1V00-WM is a QSFP-DD form factor — it is mechanically and electrically incompatible with OSFP cages on NVIDIA Quantum-2 (QM9700 / QM9790) NDR InfiniBand switches and the OSFP variant of Spectrum-4 SN5600. For 400G OSFP single-mode optics, use the MMA4Z00 / MMS4X00 OSFP family instead.

Q. Is the MMS1V00-WM an Ethernet or InfiniBand optic?
Ethernet only. The DR4 modulation, lane mapping, and CMIS profile target 400GbE per IEEE 802.3bs. It does not negotiate as an NDR InfiniBand optic. For NDR 400G InfiniBand single-mode reach, use OSFP single-mode variants (MMA4Z00-NS / MMS4X00-NM and family).

Q. What workload class fits a 400GBASE-DR4 link?
400GbE optical at 500 m is sized for AI training east-west traffic between leaf and spine, GPU-to-GPU cluster fabrics, NVMe-oF storage spines, high-bandwidth HPC, and large multi-tenant data-center backbone — workloads where 200G no longer fits aggregation but reach exceeds the practical range of DAC or AOC.

Q. What deployment topology suits 500 m DR4?
Spine-to-leaf within a single data hall, intra-row aggregation, mid-data-center cross-room runs, and AI cluster spine fabrics where adjacent and non-adjacent rows must be optically interconnected. For sub-100 m intra-rack runs use a 400G DAC or AOC instead; for over 2 km, use 400G-FR4 or 400G-LR4 long-reach optics.

Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished. Each MMS1V00-WM is bench-tested by T.E.S IT-SOLUTIONS for link-up, EEPROM and vendor-data verification, DDM telemetry validation, and full cosmetic inspection, then packaged in anti-static carrier and shipped from EU stock with global B2B options.

Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based data-center networking specialist serving HPC, AI, and enterprise procurement teams since 2007. We identify every unit by MPN, NVIDIA P/N, and optical / ASIC family before it ships, and we provide free pre-sale compatibility advice covering switch, adapter, fiber polarity, AVL / firmware verification, and breakout pairing for your specific NVIDIA Spectrum or third-party 400G QSFP-DD platform. EU stock, global B2B shipping, multi-currency invoicing, and direct contact with our engineering team.