Custom 200GBASE-SR4 QSFP56 Module
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AI Compute Foundation: Serves as the primary physical layer for GPU-to-switch connectivity, delivering ultra-low-latency 200Gbps throughput.
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PAM4 Optical Engine: Propels 50G PAM4 electrical signals across four parallel multimode lanes, maximizing the bandwidth of the standard qsfp56 form factor.
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Mellanox Verification: MSA memory maps are factory-flashed to guarantee immediate, error-free handshakes with NVIDIA/Mellanox Quantum and Spectrum routing chassis.
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ToR Optimization: Calibrated specifically for Top-of-Rack interconnects, driving optical data up to 100 meters on OM4 structured cabling.
Product Description
Hyper-scale artificial intelligence clusters require relentless data pipelines. The Custom 200GBASE-SR4 module answers this demand by injecting four independent 53.125Gbps signal streams through an MTP/MPO-12 interface. By relying on a highly efficient 850nm VCSEL array, this 200g qsfp component ensures reliable short-reach aggregation. Procured directly from WolonFiber's assembly lines, network operators receive a carrier-tested 200g transceiver equipped with onboard DSPs to actively mitigate the strict signal-to-noise penalties associated with PAM4 encoding.
Key Features
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Native Splitting: Effortlessly executes 1x200G to 4x50G hardware breakouts using standard MPO-to-4xLC harness cables for dense edge-server patching.
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Thermal Throttling Containment: Total module power draw is aggressively suppressed below 5.0W to protect tightly packed rack configurations from thermal overload.
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Real-Time DDM: A high-speed I2C bus provides administrators with precise digital diagnostic monitoring over voltage, temperature, and laser bias currents.
Application Scenarios
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Direct InfiniBand HDR interconnects within machine learning and supercomputing matrices.
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200GbE enterprise data center upgrades utilizing existing parallel multimode fiber trunks.
Technical Specifications
| Specification | Details | Specification | Details |
| Form Factor | QSFP56 | Vendor Name | WolonFiber |
| Max Data Rate | 212.5Gbps (4x 53.125Gbps) | Modulation | PAM4 |
| Wavelength | 850nm | Max Cable Distance | 100m @ OM4 / 70m @ OM3 |
| Connector | MTP/MPO-12 PC (Multimode) | Media Type | MMF |
| Transmitter | 4-Lane VCSEL Array | Receiver Type | PIN |
| TX Power | -6.0 to 4.0dBm | RX Sensitivity | < -7.5dBm |
| Power Consumption | ≤ 5.0W | Operating Temp | 0 to 70°C (32 to 158°F) |
| Host FEC | KP4 FEC (Required) | Protocols | QSFP56 MSA, IEEE 802.3cd |
Engineering FAQs
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Q: Why does a 200G PAM4 optical link require Forward Error Correction (FEC)?
A: PAM4 transmits four distinct voltage levels per cycle rather than the two levels used in older NRZ modules. This tighter electrical spacing severely reduces the signal-to-noise ratio. KP4 FEC is mathematically required to correct the inherent bit errors before they impact the network payload.
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Q: Is this
qsfp56module backward compatible with 100G QSFP28 ports?A: No. Although the physical metal casing is identical, a legacy 100G port lacks the electrical ASIC capacity to process 50G PAM4 lanes.
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Q: Does WolonFiber support custom coding for proprietary hardware?
A: Yes. We specialize in EEPROM configuration, ensuring this 200g transceiver bypasses OEM vendor-lock restrictions on enterprise switches.
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Q: Can an APC polished MPO patch cord be used here?
A: Absolutely not. This multimode optic requires a PC/UPC flat polish. Forcing an angled (APC) connector into the receptacle will crush the optical lenses.

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