Ya learn to search the archives. This has been covered MANY MANY times. bkw On Sun, 23 Nov 2003, VoIP Fan wrote: > Hello: > > I have installed *. I configured my SIP account and my X100P. But when I call from SIP or from PSTN. The SIP extension hear an echo voice of its conversation. Anyone can help me??? > > Thanks, > > voipfan