Do I need a separate Ethernet connection for my phone?

Select cloudUC Polycom phones are equipped with a built in Ethernet PC port for a secondary connection at the desktop. A single Ethernet connection at each workstation is sufficient to provide connectivity for not only your cloudUC phone but also a desktop wired Ethernet device. (Supported on the Polycom VVX 200, 300, 400, 500 and 600 series desk phones).