Keep 40 GbE links stable across longer runs with the HPE X140 40G QSFP LC LR4L 2km transceiver. Designed for single-mode fiber deployments, it pairs QSFP+ density with LC duplex connectivity to support uplinks between switches, aggregation layers, and distributed racks without adding complexity to the optical path. This module is a strong fit when you need more reach than short-range optics can provide, but do not want to overbuy for distances you will never use. The 2 km reach gives infrastructure teams room to connect across buildings, large floors, or separated equipment rooms while preserving a clean, standards-based fiber design. LC connectors simplify patching and make the module easy to integrate into existing SMF environments. For teams standardizing on HPE/Aruba optics, the X140 LR4L offers a practical balance of reach, density, and deployment simplicity. It is built for environments where link reliability, predictable optics selection, and efficient use of switch ports directly affect operating cost and network design quality.