Cisco QSFP-H40G-CU0-5M= 40GBASE-CR4 QSFP+ passive direct-attach copper

The 4-Gigabit QSFP+ transceiver module is a hot-swappable, parallel fiber-optical module with four independent optical transmit and receive channels. These channels can terminate in another 4-Gigabit QSFP+ transceiver, or the channels can be broken out to four separate 1-Gigabit SFP+ transceivers. The QSFP+ transceiver module connects the electrical circuitry of the system with either a copper or an optical external network. The transceiver is used primarily in short reach applications in switches, routers, and data center equipment where it provides higher density than SFP+ modules.