This QSFP+ transceiver supports link lengths

Interconnect Solutions QSFP+ Copper Cable assemblies were developed for high-density applications, offering a cost-effective, low-power option for high-speed data center interconnects up to 10 meters. The QSFP+ form factor  can replace up to four standard SFP+ connections, providing greater density and reduced system cost. Fiber-Optic QSFP+ Transceiver for 40 Gigabit Ethernet applications with added capability of inter-operating with  compliant products. This transceiver is a high performance module for short-range multi-lane data communication and interconnect applications.The QSFP+ connector cage and cable assemblies  and loopbacks are part of a highly-integrated system that combines effective use of space, power and port density for high-density applications; industry-leading Active Optical Cables  from Molex achieve 40 to 56 Gbps data rates over long reaches up to 4km, using a fraction of the power of other brands