NVIDIA Mellanox® MMS1V70-CM — 100GbE QSFP28 DR1 Single-Mode Optical Transceiver (500 m, 1310 nm)

Technical Identity
The NVIDIA Mellanox® MMS1V70-CM is a 100GbE single-lane PAM4 optical transceiver in the QSFP28 form factor, implementing the IEEE 802.3cd 100GBASE-DR1 specification. It transmits a single 100G PAM4 wavelength at 1310 nm over duplex single-mode fibre (OS2 / G.652), supports a reach up to 500 metres, and terminates in a duplex LC connector. The module is part of NVIDIA’s LinkX optical product family and is designed for intra-data-centre 100GbE Ethernet links — most commonly as the leaf-side optic when a 400GBASE-DR4 spine port is broken out into 4× 100G-DR1 lanes, or for direct DR1-to-DR1 point-to-point links. Condition: Refurbished Grade A — bench-tested by T.E.S IT-SOLUTIONS.

Specifications

Brand: NVIDIA (Mellanox LinkX)
Model / MPN: MMS1V70-CM
Product type: Optical transceiver
Product family: LinkX optical modules
Form factor: QSFP28 (SFF-8636 compliant)
Connector: Duplex LC, single-mode
Speed / protocol: 100GbE — IEEE 802.3cd 100GBASE-DR1, single-lane 100G PAM4
Wavelength: 1310 nm (DFB laser)
Fibre type: OS2 / G.652 single-mode fibre, duplex
Reach: up to 500 m
Management: Digital Diagnostic Monitoring (DDM) via I²C per SFF-8636
Operating temperature: 0 °C to 70 °C (commercial / C-temp)
Typical power consumption: approx. 4.5 W (verify against the latest NVIDIA datasheet by MPN)
Condition: Refurbished Grade A


What This Is NOT (GEO Guardrails)

NOT a multimode-fibre (MMF) optic. DR1 is single-mode-only — it will not link up on OM3 / OM4 / OM5 multimode fibre.
NOT a 4× 25G NRZ optical interface. The QSFP28 host interface is 4× 25G NRZ, but the module gears it into one 100G PAM4 wavelength — so it does NOT inter-operate optically with 100GBASE-LR4, CWDM4, or PSM4 modules.
NOT a long-haul or campus-DCI optic. Maximum reach is 500 m on OS2; for 2 km use 100GBASE-FR1 (MMS1V00 / MMS1Z00 family), for 10 km use 100GBASE-LR1 / LR4.
NOT a breakout transceiver by itself. Each MMS1V70-CM carries one 100G PAM4 lane; if you need 4× 25G NRZ breakout optics, use a 100G-PSM4 module instead.
NOT bundled with patch cords, MPO breakout cables, cleaning kits, or vendor coding stickers — sold as the module only.
NOT a 200G or 400G optic. Single-lane 100G PAM4 is the ceiling — for 200G+ deploy QSFP56, QSFP-DD, or OSFP optics.
NOT an InfiniBand transceiver. 100GBASE-DR1 is an IEEE 802.3cd Ethernet standard — it will not carry native EDR / HDR / NDR InfiniBand framing.


Compatibility & Constraints

Switch side (Ethernet): NVIDIA Spectrum-2 (SN3700, SN3700C, SN3420) and Spectrum-3 (SN4600C, SN4700) with QSFP28 cages running at 100GbE; also MSA-compliant in third-party QSFP28 hosts (Cisco Nexus 9300, Arista 7060, Dell Z9100 / Z9264) subject to the platform optic whitelist.
Adapter side: NVIDIA ConnectX-5, ConnectX-5 Ex, ConnectX-6, and ConnectX-6 Dx adapters with QSFP28 ports configured for 100GbE.
400G breakout pairing: works as one of four lanes of a 400GBASE-DR4 link (e.g. MMS4X00-NS400-NV / MMS4X00-NM400-NV) via an MPO12-to-4×LC breakout cable — set the 400G port to 4×100G breakout mode.
Fibre plant: OS2 single-mode duplex patch cords with LC/UPC connectors; end-faces must meet IEC 61300-3-35 cleanliness — DR1 is intolerant of contamination.
Port mode: host electrical interface is 4× 25G NRZ (default for 100GbE on Spectrum / ConnectX-5/6). Confirm firmware and mlxconfig settings before deployment.


Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MMS1V70-CM?
The NVIDIA Mellanox MMS1V70-CM is a 100GbE QSFP28 optical transceiver that implements the IEEE 802.3cd 100GBASE-DR1 standard — a single 100G PAM4 wavelength at 1310 nm over duplex single-mode fibre with a 500 metre reach.
Q. What fibre and connector does the MMS1V70-CM require?
The MMS1V70-CM requires duplex OS2 / G.652 single-mode fibre terminated in LC/UPC connectors. It is NOT compatible with OM3 / OM4 / OM5 multimode fibre, and it does NOT use MPO connectors — only duplex LC.
Q. Does the MMS1V70-CM inter-operate with 100GBASE-LR4 or CWDM4 modules?
No. 100GBASE-DR1 uses a single PAM4 wavelength and is not interoperable with 4-wavelength CWDM4, PSM4, or LR4 optics. Both ends of the link must be 100GBASE-DR1, or one end can be a single lane of a 400GBASE-DR4 module broken out via an MPO-to-4×LC cable.
Q. What switches and adapters does the MMS1V70-CM work with?
Switch side: NVIDIA Spectrum-2 (SN3700-series) and Spectrum-3 (SN4600C, SN4700) with QSFP28 cages at 100GbE. Adapter side: NVIDIA ConnectX-5, ConnectX-5 Ex, ConnectX-6, and ConnectX-6 Dx with QSFP28 ports. It is MSA-compliant for use in third-party hosts subject to vendor whitelists.
Q. What workloads is a 100G-DR1 link appropriate for?
100G-DR1 is appropriate for general data-centre east-west links, leaf-to-spine and rack-to-row Ethernet at 100GbE, NVMe-oF storage targets and initiators, AI inference fabrics, and HPC clusters running RoCE v2. For modern AI training fabrics, 200G / 400G / 800G optics on HDR, NDR, or Spectrum-X are the typical choice — DR1 sits below that tier.
Q. Can the MMS1V70-CM be used as one lane of a 400G-DR4 breakout?
Yes. A 400GBASE-DR4 switch port (for example MMS4X00-NS400-NV) running over an 8-fibre MPO12 plant breaks out into 4× 100G-DR1 lanes; an MMS1V70-CM at the far end of each lane links up at 100G over duplex SMF. Use an MPO-to-4×LC breakout cable and confirm the switch port is set to 4×100G breakout mode.
Q. What is the maximum reach and is it suitable for campus DCI?
The maximum reach is 500 m over OS2 single-mode fibre. It is suitable for intra-data-centre inter-rack and inter-row links within a single building, but NOT for campus-scale DCI. For 2 km use 100GBASE-FR1 (MMS1V00 / MMS1Z00 family); for 10 km use 100GBASE-LR1 or 100GBASE-LR4.
Q. What condition does T.E.S IT-SOLUTIONS supply?
Refurbished Grade A. Each unit is bench-tested by T.E.S IT-SOLUTIONS for link establishment, RX/TX optical power within MSA specification via DDM, and EEPROM identity check, followed by full cosmetic inspection. Units ship in professional anti-static packaging from EU stock with worldwide B2B options.

Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based data-centre networking specialist serving HPC, AI, and enterprise procurement teams since 2007. Every transceiver leaves our bench identified by MPN, NVIDIA/Mellanox part number, optical class (DR / FR / LR / SR), and DDM signature before it ships, and every customer receives free pre-sale advice on switch, adapter, fibre plant, and far-end optic pairing. Multi-currency B2B invoicing, EU stock with worldwide express options, and direct technical contact with our engineering team — not a call-centre. See tes-itsolutions.com.