Auto provision of configuration, Customized right tone for different regions, Independent RJ9 headset support, Wall mounted structure, L2TP VPN without IPSec, Suppport QoS, Full duplex speaker with HIFI voice quality, Dual RJ45 port (WAN+PC), Elastix certified, Support hardware HD voice and G.722 codec, Back light on LCD display, SIP support, Power Over Ethernet (PoE)