Macroreer for Cisco QSFP-4SFP10G-CU5M 40G QSFP+ to 4SFP+ Copper Breakout Cable 5m(16.4ft) Passive QSFP+ to 4SFP+ Direct-Attach Copper Breakout Cable (DAC) 5-meter . Cisco QSFP-4SFP10G-CU5M comaptible, be specifically programmed to be fully compatibility and seamlessly connect Cisco 40G QSFP+ ports to four Cisco 10G SFP+ ports. Connectors: QSFP+ to 4SFP+. Every cable be tested within test lab's latest network switches, servers and routers for compatibility and functionality. 3-Year Warranty.