Understanding Fiber Distance Limitations for Intel® E25GSFP28LRX: Exploring OM4 Fiber Compatibility
Content Type: Compatibility | Article ID: 000095855 | Last Reviewed: 12/18/2023
Part Number E25GSFP28LRX has conflicting data online. Is it an MMF or SMF?
When using LR (Long Reach) modules such as the Intel® E25GSFP28LRX, it is advised to employ SMF (Single Mode Fiber) for optimal performance. The LR modules are specifically designed to work with SMF and have a recommended maximum distance of 10 kilometers.
While it is possible that OM4 MMF (Multi-Mode Fiber) could function with an LR module, it is important to note that Intel does not officially support or test this configuration. As a result, no specified maximum distance can be provided.
For OM4 MMF compatibility, Intel recommends utilizing 25G SR (Short Reach) modules instead of LR modules. The maximum distance supported by OM4 MMF when paired with 25G SR modules is 100 meters.
It is crucial to understand that SR modules cannot be used with SMF due to the smaller core diameter. SMF has a core diameter of 10µm, while OM4 MMF has a core diameter of 50µm. Therefore, for LR modules, it is essential to opt for SMF to ensure compatibility and adherence to recommended distance limitations.