... .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/SDP/TFTP/ ... , silence restrain and comfort noise generation.Agility AccessSupport IP special telephone line, ADSL LAN Cable Modem;HIP1860(3 ... ;The Managment of customer purview. HIP1860(3) IP Phone SIP PHONE connect with Voip gateway