... optional ,1*WAN/1*LAN/1*WLAN optional (support WiFi ,802.11b/g), 1*SIM slot ,PPPoE/ADSL,NAT ... ,VOIP Ethernet Interface:1-2 *10/100Base-T;Calling Control Protocol:H.323, ... talking, Volume adjusting, Ringing tone selection, Call ID, Phone book, Missing incoming call, Incoming call, Outing call. ... ;The Managment of customer purview. HIP1860(3) IP Phone SIP PHONE connect with Voip gateway