Connect a 100GbE QSFP28 port to four independent 25GbE SFP28 ports with an active optical breakout cable built for a 30 m link span. The cable places the QSFP28 host end at the switch, router, or network adapter and presents four SFP28 ends for downstream 25GbE connections. Its active optical construction carries the optical conversion in the cable assembly rather than requiring separate pluggable optics at each endpoint. This topology supports 100GbE-to-4 × 25GbE fan-out connections where a high-density QSFP28 port must serve four SFP28-attached devices or ports. It is suited to top-of-rack and aggregation environments that use 25GbE server-facing links while retaining 100GbE port density upstream. The 30 m length provides reach for cross-row, cabinet-to-cabinet, or longer in-room connections where direct-attach copper is generally impractical. MFA7A50-C030-AO is an AddOn Networks Mellanox-compatible, TAA-compliant active optical cable with a fixed QSFP28-to-four-SFP28 breakout arrangement. The integrated assembly removes the need to select individual optical transceivers and fiber patch leads for this specific fan-out path. Verify that the host port supports 100GbE QSFP28 breakout operation and that each downstream port is configured for 25GbE SFP28 operation before installation.