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200G network transceiver modules are mainly used in modern network architectures for AI computing power clusters, ultra large scale data centers, high-performance computing (HPC), and telecommunications backbone networks. Here are several specific practical application cases to share. If you have any questions, welcome to our sales team.
Case 1. AI computing power and high-performance computing (HPC)
This is currently the most core application area of 200G network transceiver modules, mainly utilizing their low latency and high bandwidth characteristics.
- Product: 200G QSFP56 SR4 or 200G HDR InfiniBand.
- Specific case: In GPU clusters for training large AI models (such as GPT series), extremely high data exchange speeds are required between servers. Using HDR InfiniBand technology such as NVIDIA Mellanox, millisecond level response between computing nodes and storage, as well as between computing nodes, is achieved through 200G modules.
- Connection method: 200G AOC cable (fiber active cable) or copper DAC (copper sfp cable) is usually used for short distance interconnection inside the cabinet.
Case 2. Internal Interconnection of Ultra Large Scale Data Centers
The internal structure of data centers is complex, and switches at different levels have different requirements for optical modules.
Leaf-Spine hierarchical interconnection:
- Product: 200G QSFP56 FR4
- Specific case: In the data centers of large cloud service providers such as AWS and Alibaba, there is usually a distance of several hundred meters to 2 km between Leaf switches and Spine switches.
- Advantages: The FR4 network transceiver module supports 2km transmission and only requires a pair of single mode fibers to achieve 200G transmission, significantly reducing fiber cabling costs.
ToR switch and server connection:
- Product: 200G QSFP56 DAC
- Specific case: In a standard server rack, in order to pursue the ultimate cost-effectiveness and low power consumption, 1 to 3 meters of DAC fiber cables is usually used to directly connect the server network card to the switch at the top of the rack.
3. Telecommunications Backbone Network and Metropolitan Area Network DCI
Used for cross regional or cross city data center interconnection (DCI), long-distance transmission can reach up to 80km.
- Product: 200G CFP2-DCO (Coherent Optical Module).
- Specific case: Telecom operators use coherent technology to transmit 200G signals up to 80km or even further when building backbone networks between cities.
- Advantages: Compared to ordinary modules, coherent modules have extremely strong anti dispersion capabilities and can achieve ultra long distance communication without the need for complex dispersion compensation equipment.
Conclusion
If you are upgrading your network, please make sure to confirm whether the switch port supports PAM4 modulation (required by QSFP56 200G), or whether it needs to be backward compatible with old devices (where QSFP-DD is more advantageous).
| Scene | Recommended part no. | Transmission medium | Transmission distance |
| Connection inside the cabinet | 200G QSFP56 DAC | Copper wire | < 3m |
| Cabinet room/short distance cluster | 200G QSFP56 SR4 | MMF(OM4) | <100m |
| Cross floor/park connection | 200G QSFP56 FR4 | SMF (OS2) | < 2km |
| Cross city DCI | 200G Coherent CFP2 | DWDM system | > 80km |