On Thursday 05 June 2008 09:50:05 Eric "ManxPower" Wieling wrote: > Echo Canceler Freak Out, this happens when the rxgain is too high and > the echo canceler freaks out. Some users describe it as "screeching", > "feedback", "static", or other useless terms. If users report "static" > on a system where there cannot be static (all digital, PRI, SIP, etc), > you might be experiencing ECFO.
Considering he's using an analog card, that last statement does not apply. > Drew Gibson wrote: > > Tilghman Lesher wrote: > >> On Wednesday 04 June 2008 22:02:19 John Morey wrote: > >>> Hello, > >>> > >>> I've run fxotune at different times but continue to get what seem to be > >>> strange numbers in /etc/fxotune.conf. It ends up with: > >>> > >>> 5=7,255,251,251,2,255,255,1,255 > >>> 6=7,255,251,251,2,255,255,1,255 > >>> 7=7,255,251,251,2,255,255,1,255 > >>> 8=9,2,250,253,4,252,0,255,255 > >>> 9=4,0,0,0,0,0,0,0,0 > >>> 10=5,0,0,0,0,0,0,0,0 > >>> 11=0,0,0,0,0,0,0,0,0 > >>> 12=0,0,0,0,0,0,0,0,0 > >>> ports 5-10 have lines hooked up to them. The first four lines seem > >>> strange when compaired to what others have posted and what ports 9 and > >>> 10 have. > >>> > >>> Also if I'm reading things right my echo ratios seem to be very > >>> high. Running "fxotune -d -b 5 -w 1004" gives the following: > >>> Dumping module /dev/zap/5 > >>> echo ratio = 0.1759 (1960.0 / 11145.0) > >>> Which I read to be over 17%. This seems crazy. Am I reading this > >>> right? Where should I start to look for problems? > >> > >> You might check to see if the tip and ring are reversed in your wiring. > >> That can frequently cause weird echo problems. > > > > Which ports would you expect to be reversed? 5-8 or 9-10? > > > > I have similar settings in my fxotune.conf for a TDM2400P and I'm > > getting complaints of "static" on the line that I suspect are related to > > an overtaxed h/w echo canceller > > > > My fxotune.conf:- > > > > 13=7,255,251,251,2,255,255,1,255 > > 14=9,254,251,255,2,0,1,0,0 > > 15=9,254,251,255,2,0,1,0,0 > > 16=5,0,0,0,0,0,0,0,0 > > 17=9,254,251,255,2,0,1,0,0 > > 18=9,254,251,255,2,0,1,0,0 > > 19=9,254,251,255,2,0,1,0,0 > > 20=9,254,251,255,2,0,1,0,0 > > 21=9,254,251,255,2,0,1,0,0 > > 22=9,254,251,255,2,0,1,0,0 > > 23=9,254,251,255,2,0,1,0,0 > > 24=9,254,251,255,2,0,1,0,0 > > > > regards, > > > > Drew -- Tilghman _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users