QDD-400-AOC1M=

The QDD-400-AOC1M is a 400 Gigabit active optical cable, 1 m long, with a QSFP-DD connector on each end and multimode fibre between them. Because it is built to a set length, stock planning is by length, so a rack plan listing each link helps ordering. Cisco's 400G QSFP-DD data sheet lists it in the QDD-400-AOC family, from 1 m to 30 m, with forward error correction handled by the host platform. Hot-swap behaviour follows the host port, and the link normally comes up once both ends are seated. Plan the route before ordering, because a fixed-length cable cannot be shortened or extended later. It is intended for data-centre environments and has a standard commercial temperature range. The optics are sealed in the connector bodies, so there is no MPO connector to clean and no transceivers to pair. It fits the shortest runs, such as a switch feeding a server or patch panel a few rack units away in the same cabinet. The fibre jacket is far lighter and more flexible than 400G copper, which matters in dense spine-leaf rows.