Connect the computer's serial port to the router, switch, and RJ45 console port on the firewall . . . RS232 9-pin serial to RJ45 Cat5 Ethernet, compatible with Cisco routers, including 600, 800, 1600 and 1700 series . . . Easy to set up: Plug and play, just plug the device into the adapter and plug the adapter into your PC or Mac . . . Made of high quality raw material PVC, wear resistant, acid and alkali resistant, long service life, oxygen-free copper conductor, anti-UV anti-tarnish, durable, is your best choice