General Specifications Manufacturer Cisco Manufacturer Part # QSFP-H40G-CU5M Product Description Cisco 40GBASE-CR4 Passive Copper Cable – Twinaxial cable – QSFP+ – QSFP+ – 16.4 ft – gray – for P/N: QSFP-40G-SR4, QSFP-40G-SR4= Type Twinaxial cable Length 16.4 ft Connector(s) 1 x QSFP+ Connector(s) (Other Side) 1 x QSFP+ Color Gray Manufacturer Warranty 90 days warranty Designed For P/N: QSFP-40G-SR4, QSFP-40G-SR4= ? Extended Specifications General Network Cable Type Twinaxial cable Length 16.4 ft Color Gray Connectivity Connector(s) 1 x QSFP+ Connector(s) (Other Side) 1 x QSFP+ Manufacturer Warranty Service & Support 90 days warranty Environmental Parameters Min Operating Temperature 32 ?F Max Operating Temperature 158 ?F Compatibility Information Designed For P/N: QSFP-40G-SR4, QSFP-40G-SR4= Brief Overview 40GBASE-CR4 Passive Copper Cable Twinaxial cable Length 16.4 ft QSFP+ Gray The Cisco copper direct attach H40BASE cable is a passive 5m distance cable suitable for very short distances and offer a highly cost-effective way to establish a 40-Gigabit link between QSmall Form-Factor Pluggable ports of Cisco switches within racks and across adjacent racks. Cisco currently offers passive cables in lengths of 1,3 and 5 meters. The direct attach copper cable enables efficient system airflow and have no EMI issues, which is critical in high-density racks. The Cisco 40GBASE QSmall Form-Factor Pluggable (Quad Small Form-Factor Pluggable) portfolio offers customers a wide variety of high-density and low-power 40 Gigabit Ethernet connectivity options for data center, high-performance computing networks, enterprise core and distribution layers, and service provider applications.