... standard protocols like SIP, MGCP and H.323, achieving out-of-the-box interoperability with the industry leading softswitches, gateways, and DSLAMs ... Hold, Call Waiting, Call Forwarding and Call Transfer for VOIPSupports 3-way conferenceSupports Direct number dialingRemote administration and automatic remote firmware ... (G.DMT),ITU G.992.2 (G.LITE),G.992.3 (G.DMT.BIS, also referred to as ADSL2),G.992 ...