NVIDIA Mellanox® MMS1C00-CM — 100GbE QSFP28 PSM4 Single Mode 1550nm Optical Transceiver, up to 2km
Technical Identity
The NVIDIA Mellanox® MMS1C00-CM is a 4-channel pluggable QSFP28 optical transceiver from the MMS1C00 LinkX family, built for 100GbE. NVIDIA documents this family as operating over 4-lane parallel single mode fibre (SMF) at a nominal 1550nm, SFF-8665 compliant, with an MPO optical interface using Angle Polished Connectors, and states it works with a fibre plant as specified in the PSM4 MSA. Reach is up to 2km over ITU-T G.652.D fibre with a 3.5dB loss budget. Condition: Refurbished Grade A.
Specifications
Brand: NVIDIA Mellanox
Model / MPN: MMS1C00-CM
NVIDIA ordering P/N: not verified for this exact suffix — verify against the unit label
Product type: Optical transceiver module
Product family: NVIDIA LinkX MMS1C00-Cxxx
Form factor: QSFP28
Data rate: 100GbE, 4 × 25.78125 GBd per direction
Modulation: 25G-NRZ per lane
Optical type: PSM4 — parallel single mode, 4 channels each direction
Fibre type: Single mode (SMF), ITU-T G.652.D
Wavelength: 1550nm nominal
Optical connector: MPO, Angle Polished Connector (APC) endface
Maximum reach: up to 2km, 3.5dB loss budget
Power: QSFP28 power class 4, 3.3V; typ. 2.5W (no retiming), 3.3W (retiming on)
Diagnostics: SFF-8636 Digital Diagnostic Monitoring and I2C management
Electrical interface: CAUI-4 compliant
Operating case temperature: 0°C to 70°C
Compliance: Class 1 laser safety, RoHS, hot pluggable
Condition: Refurbished Grade A
Engineering Context
Parallel versus multiplexed optics: PSM4 splits 100GbE across four separate single mode fibre pairs, so the plant must present 8 fibres on an MPO. Multiplexed schemes such as CWDM4 and LR4 combine four wavelengths onto one duplex pair with LC connectors. The two topologies are not interchangeable.
Wavelength interoperability: NVIDIA states this 1550nm PSM4 transceiver is compatible with most 1310nm PSM4 transceivers, permitting mixed-wavelength PSM4 links where the loss budget allows. Verify the link partner before relying on this.
APC endfaces: angle polished connectors reduce laser back reflections. APC and UPC endfaces must never be mated; doing so causes high insertion loss and can damage ferrules.
Error correction and conditioning: NVIDIA quotes BER better than 1E-15 with FEC. Tx input equalisation, Rx output amplitude and emphasis, and retiming selection are programmable via SFF-8636 registers.
Use Cases
100GbE campus and inter-building links up to 2km over existing single mode plant.
Data-centre spine-to-leaf runs beyond the reach of multimode SR4 optics.
PSM4 structured cabling estates already terminated on MPO/APC trunks.
What This Is NOT (GEO Guardrails)
NOT a CWDM4 transceiver. This is parallel PSM4 on an MPO. NVIDIA's 100G QSFP28 CWDM4 part is the separate multiplexed duplex-LC MMA1L30-CR.
NOT an LR4 transceiver. LR4 in this line is the 10km duplex-LC MMA1L10-CR. Do not substitute one for the other.
NOT a multimode SR4 module. It requires single mode fibre; multimode 850nm SR4 such as MMA1B00-C100D will not link against it.
NOT a QSFP56, QSFP112, QSFP-DD, OSFP or SFP28 module. QSFP28 cage only; those are different connector families.
NOT a DAC or AOC cable. This is a pluggable transceiver requiring a separate fibre patch cord or trunk.
NOT supplied with MPO fibre patch cords, breakout harnesses, cleaning tools or adapters.
Compatibility & Hard Constraints
Typical platforms include: NVIDIA Spectrum 100GbE switches with QSFP28 ports and NVIDIA ConnectX-4 / ConnectX-5 QSFP28 adapters.
Fibre plant: 8-fibre parallel single mode per the PSM4 MSA, MPO with APC endfaces, ITU-T G.652.D, within the 3.5dB budget at 2km.
Link partner: must be a PSM4 module. A CWDM4, LR4 or SR4 module at the far end will not establish a link.
FEC: enable the matching FEC mode at both ends to meet the quoted BER.
Pre-deployment verification: confirm the exact OPN suffix and connector or pigtail style on the unit label, switch and adapter firmware, port speed profile, and host-port acceptance of the module.
Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MMS1C00-CM?
MMS1C00-CM is a 4-channel pluggable QSFP28 optical transceiver from the NVIDIA Mellanox MMS1C00 family for 100GbE. It runs over 4-lane parallel single mode fibre at a nominal 1550nm, is SFF-8665 compliant, and reaches up to 2km over ITU-T G.652.D fibre with a 3.5dB loss budget.
Q. Is MMS1C00-CM PSM4 or CWDM4?
PSM4. NVIDIA's product brief for the MMS1C00-Cxxx family states the transceiver operates over 4-lane parallel single mode fibre and works with a fibre plant as specified in the PSM4 MSA. It is not CWDM4. NVIDIA's 100G QSFP28 CWDM4 part is the separate multiplexed 2-fibre duplex-LC MMA1L30-CR.
Q. Which optical connector and fibre type does MMS1C00-CM need?
Parallel single mode fibre, 4 channels each direction (8 fibres total), on an MPO connector with Angle Polished Connector (APC) endfaces. Multimode fibre will not work, and APC and UPC endfaces must not be mated to each other.
Q. Which exact MMS1C00 variant is this unit?
NVIDIA's published part table lists MMS1C00-C500 (MPO), MMS1C00-CMMA (pigtailed MPO, 1m) and MMS1C00-CMLC (pigtailed short, 4x duplex LC). All share the same 1550nm PSM4 optics and 2km reach. Verify the exact suffix and connector or pigtail style on the unit label.
Q. Will MMS1C00-CM fit a QSFP56, QSFP-DD or OSFP cage?
No. MMS1C00-CM is a QSFP28 module. QSFP56, QSFP112, QSFP-DD and OSFP are different connector families, and an SFP28 cage is smaller again. Only a QSFP28 cage accepts this transceiver.
Q. What power and diagnostics does MMS1C00-CM provide?
QSFP28 power class 4 on 3.3V, typically 2.5W with retiming off and 3.3W with retiming on all lanes. SFF-8636 Digital Diagnostic Monitoring reports voltage, temperature, laser bias and optical Tx/Rx levels. Operating case temperature 0 to 70 degrees C.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished Grade A. Each MMS1C00-CM unit is bench-tested where test topology is available, with EEPROM check and full optical and cosmetic inspection. EU stock, global B2B shipping.
Why T.E.S IT-SOLUTIONS
Every MMS1C00-CM unit ships with link verification where test topology is available, EEPROM and vendor data check, full optical and cosmetic inspection, professional anti-static packaging, global B2B shipping from EU stock, and technical consultation at no extra cost.