400G SR4 vs. DR4 vs. FR4 vs. LR4: A Practical Guide to Choosing the Right Optical Transceiver
Data center operators upgrading to 400G face a familiar challenge: the transceiver options all promise 400 Gbps, yet each is engineered for a different combination of distance, fiber type, and connector. Choosing the wrong one wastes budget at best and breaks the link budget at worst. This guide breaks down the four most common 400G…