1,5 line voip net phone 2, 5 sip registration 3,3 way conference call 4,IP Assignment: DHCP, ... static IP 5,support PPPOE Skyline 5 Line Sip Voip network Phone(sip&H.323) Network communication Overview Function1,support 5 ... sip accounts2,support 3 way conference call3,support sip(RFC2543,RFC3261)4,support ...