> > Well, the problem is the difference between keeping under 16ms and > > sliding _just_ over limit to 18ms would make the effect audible almost > > immediately. We used the sangoma echospike tools to measure the delay > > and adjusted our taps accordingly. > > Sangoma echospike tools? Please elaborate!
See sangoma's -users posting from Dec 13th, which I quote: "I just wanted to let you know that we do provide a tool to debug echo. We send a unit impulse and record the Finite Impulse Response (FIR) so it can be plotted and analyzed. The code that does this is the release at ftp.sangoma.com/linux/custom/2.3.4. Instructions on using it are in the wiki in http://sangoma.editme.com/wanpipe-linux-asterisk-debugging. Although the code is wanpipe, all the interaction is at the zaptel level, so I am pretty sure it will work on Digium or other cards as well. Just being able to see what the echo looks like on a troublesome line gives quite a lot of info. You can see if the echo is delayed, or markedly non-linear." I haven't tried it as yet but plan to do so. Rich _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
