The Yealink SIP-T48U packages 16 VoIP accounts, 29 single touch DSS keys, Optima HD, a PoE Gigabit Ethernet port, a Gigabit Ethernet expansion port, and Bluetooth headset support with the BT40, behind an intuitive 7 inch touch screen.
Video: https://www.youtube.com/watch?v=KT-hFBGTfi4