Patchcord Extralink - network cable necessary for computer networks. A LAN patchcord is the basic element of computer networks operating in Ethernet standard. Extralink's patchcord is used to directly connect two active devices, such as a router or switch, so that data can be transferred between them. It is also used to connect computers or VoIP telephones to the structured cabling and to make switches between patch panels in IT cabinets. It is perfect for both large and small computer networks. Extralink's shielded patchcord is highly flexible, which translates into installation convenience and user comfort.