USED-B High-end enterprise phone -17,8 cm ( 7 inch ) touch screen with 20 SIP lines and total 127 DSS keys-Gigabit Ethernet and HD Voice -EHS support -Gigabit Ethernet and POE supported -Support receiving Video call-G.722, AMR-WB , Opus Support - Built-in Bluetooth for connecting Bluetooth headset - Wi-Fi connectivity(Via Wi-Fi dongle) - Up to 127 DSS keys entries available at the display - VPN: L2TP / OpenVPN