This cable has the same spec and function of CSYNC-RJ45 cable but adding an extra RJ-45 female jack to provide an extra connecting point for linking to one more KVM switch or to a serial port (RS-232) of external system or networked serial server.
The CSYNC-RJ45-Y allows you to connect a KVM and video switch together and switch both of them with one button press. This allows you to have multi-monitor configurations without having to buy a whole new switch! The red end of the cable goes into your main switch, preferably the KVM, and the grey end plugs into the secondary switch. When the primary switch changes ports, the secondary follows instantly!