1 port VOIP gateway, with 1 10/100Base-T RJ-45 for LAN,1 10/100Base-T RJ-45 for PC,1 RJ11 for Phone (FXS) , 1 RJ11 for lifeline Voice Feature Support SIP 2.0 and correlative RFCs Support IAX2 (optional) SIP supports 2 SIP servers, public and private server. Can connect to public SIP server and private SIP server at the same time Codec: G.711A/u, G.729,G.729a/b, G.726-32k Echo cancellation: G.168 ...