QSFP-H40G-AOC2M=

The QSFP-H40G-AOC2M is a 40 Gigabit active optical cable, 2 m long, with a QSFP+ connector on each end and multimode fibre carrying four lanes between them. Cisco's 40GBASE QSFP data sheet lists it among the QSFP-to-QSFP active optical cables, available from 1 m to 30 m. The cable is a single sealed assembly, supplied as the spare part number with the equals suffix. This length covers links within one rack, and reaches the next cabinet when the two racks stand side by side. The optics are sealed into the connector bodies, so there are no MPO connectors to clean and no transceivers to match. Label both ends at installation, since cables of different lengths look identical in a dense rack. The fibre jacket is lighter and thinner than 40G copper and avoids the reach limits copper has at this speed. Check the host platform's supported-cable list before deploying, as support varies by switch family and software release. Laying the cable in before the equipment is fully racked leaves the final connection for last and saves rework.