... ,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,Out-of band DTMF,SIP info ... Interface:1×10Mbps/100Mbps RJ-45 PortFunction Keys:26 function keys besides standard keys 0-9,#,*Speaker:Full Duplex ... Non-condensing)Dimension:275mm×256mm×76mmWeight:1.11KG IP Phone with PSTN Port, POE function