This phone is for the office which utilizes a Gigabit network infrastructure. Standard in this TC-04G phone is a two-port 10/100/1000 Gigabit switch and Power-over-Ethernet (POE) support. The sleek stylish design of the TC-04G is ideal for any office setting wanting HD-Audio Quality and one-button access to up to four telephone lines or extensions. Sporting a large and easy to read 192 x 64 graphical backlit display with adjustable brightness, along with a Full-Duplex Speakerphone, Headset Support,  visual ring indicator and ten predefined hard buttons for Speakerphone, 3-Person Conference Calling, Do Not Disturb, Hold, Transfer and much more.