SIP/H.323/MGCP , POE optional ,1*WAN/1*LAN/1* ... WiFi ,802.11b/g), 1*SIM slot ,PPPoE/ADSL,NAT ,VOIP Ethernet Interface:1-2 *10/100Base-T;Calling Control Protocol ... :H.323,MGCP,SIP;Network Protocol:TCP/IP/UDP/ARP/ICMP/HTTP/RTP/RTCP ... technology;The Managment of customer purview. HIP1860(3) IP Phone SIP PHONE connect with Voip gateway