NVIDIA Mellanox MMS1W50-HM 200Gb/s HDR InfiniBand QSFP56 Transceiver, FR4, Duplex LC, 2km SMF, CWDM4: This is a long-reach optical transceiver module in QSFP56 form factor for 200Gb/s HDR InfiniBand connectivity. The FR4 interface uses CWDM4 wavelength division multiplexing to transmit four 50Gb/s PAM4 channels over a single pair of single-mode fibers via Duplex LC connector. Maximum reach is 2 kilometers on OS2 single-mode fiber. This is a refurbished unit.
Engineering Context
The MMS1W50-HM addresses the campus-reach requirement for HDR InfiniBand fabrics. Standard multimode SR4 transceivers are limited to approximately 100m, which is insufficient for inter-building or cross-data-hall connections. The FR4 technology multiplexes four CWDM4 wavelengths onto a single fiber pair, extending reach to 2km while using simple Duplex LC cabling instead of complex MPO parallel fiber assemblies. This significantly reduces cabling costs for long-distance InfiniBand links. The module delivers 212.5Gb/s aggregate line rate (4x 53.125Gb/s PAM4 lanes). Maximum power consumption is 5.5W.
Deployment & Use Cases
Inter-building HDR InfiniBand connectivity for campus area networks. Connecting GPU compute clusters to remote storage arrays across data halls (up to 2km). Core-to-edge InfiniBand switching where multimode fiber reach is insufficient. Disaster recovery synchronous replication links within a 2km metro radius.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MMS1W50-HM
Form Factor: QSFP56
Protocol: HDR InfiniBand (200Gb/s)
Interface: 200GBASE-FR4 (Duplex LC UPC)
Modulation: 4-channel CWDM4 (50G-PAM4 per lane)
Fiber Type: Single-Mode (OS2)
Reach: 2km
Power: 5.5W maximum
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
InfiniBand HDR Only: This transceiver is designed for HDR InfiniBand operation (200Gb/s). Verify switch and adapter firmware support for FR4 optics. QSFP56 Ports Only: Requires QSFP56-capable ports on Quantum HDR switches (QM8700/QM8790) and ConnectX-6 HDR adapters. Not compatible with QSFP28, QSFP-DD, or OSFP ports. Single-Mode Only: Requires OS2 single-mode fiber with Duplex LC UPC connectors. Not compatible with multimode (OM3/OM4) fiber or MPO connectors. Duplex LC: Uses standard 2-fiber Duplex LC, not MPO parallel fiber. Ensure fiber plant supports single-mode LC patching over the required distance.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS tests every transceiver for optical power output, wavelength accuracy, and connector condition before shipment. We provide expert consultation for long-reach InfiniBand fabric design, global shipping with tracking, and a comprehensive warranty.