Hear every nuance with Poly HD Voice and Poly Acoustic Clarity technologies. Poly Acoustic Fence technology reduces distracting background noise and makes calling a pleasure. Enjoy the ergonomic design and the intuitive user touchscreen interface that saves you the hassle of learning new features and functions. When a phone is this easy, better collaboration and productivity aren’t far behind. "Entry-level" just got sweeter. The Poly CCX 400 is an entry-level business phone that’s easy to use. Its interface is simple and intuitive. And contacts and meetings are one swipe or one tap away on a color touch screen. Design. Product colour. Black. Handset type. Wired handset. Product type. IP Phone. Phone features. Caller ID. Yes. Lines quantity. 24 lines. Display. Touchscreen. Yes. Aspect ratio. 16:9. Display resolution. 720 x 1280 pixels. Display diagonal. 12.7 cm (5"). Display. LCD. Audio. Voice codecs. G.722, G.729ab, G.711alaw, iLBC, G.711ulaw, Opus. Speakerphone. Yes. Network. Security algorithms. TLS, 256-bit AES, Srtp. Bluetooth. No. Wi-Fi. No. Ethernet LAN interface type. Gigabit Ethernet. Ethernet LAN data rates. 10,100,1000 Mbit/s. Ethernet LAN. Yes. Ports & interfaces.