Connect one 400G QSFP-DD interface to four QSFP56 connections with an integrated active optical breakout assembly. The cable combines the optical interface electronics and fiber paths in a fixed 3 m construction, creating a direct fan-out path from a high-density 400G port to four downstream QSFP56 endpoints. It is suited to short interconnects inside racks, between adjacent racks, or across compact network rows where a fixed optical cable length is appropriate. The QSFP-DD connector terminates at the 400G side, while the opposite end presents four QSFP56 connectors. This connector arrangement is the defining requirement for deployments that need a single high-capacity switch, router, or fabric interface broken out into four physical QSFP56 links. Active optical construction avoids the separate transceiver modules and patch leads otherwise required to assemble an equivalent optical path. QD44Q-AO03M-NO-AX is specified for Juniper-compatible environments and provides a 3 m reach for close-proximity network equipment. Verify that the host ports support the intended QSFP-DD-to-QSFP56 breakout mode before installation. The fixed cable design makes connector orientation, cable routing, and available slack important considerations when planning the physical path between the 400G host port and the four endpoint ports.