SFP+ Direct Access Cables (Copper Twinax Passive cables) offer a highly cost-effective way to connect ZyPer4K encoders/decoders to a 10Gb network switch and are suitable for very short distances. These cables are used when you have ZyPer4K encoders / decoders will be located in the same rack/close proximity to the network switch. The SFP+ Direct Access cables support 10 Gigabit Ethernet connections and are compatible with most major brands of network switches.