The QSFP-40G-DAC-P5M-CSC DAC copper cable is programmed to be compatible with a wide range of Cisco network equipment for intra-rack connections in data centers such as 40G Switches, Routers, Network Interface Cards (NICs) and Network Storage Systems. It’s proven to be a cost-effective alternative to high-cost Cisco QSFP-H40G-CU5M 40Gb/s QSFP+ 5m DAC direct attach the copper cable.