... LEC,Packet Loss compensation,Adaptive Jitter BufferCodec:G.711,G.723.G.726,G.729A,G.729B,iLBCCall Function :Call hold,Call Waitting,Call forward,Call ... ID,3 way callDTMF Function:In-band DTMF, ... 45WAN Interface:1×10Mbps/100Mbps RJ-45 PortFunction Keys:26 function keys besides standard keys 0-9,#,*Speaker:Full Duplex ...