Eliminating Asterisk VOIP Echo Issues

> We have found this post regarding improving phone quality by > eliminating line echo and properly tuning the analog cards of an > Asterisk box very helpful and accurate. > > http://www.trixbox.org/forums/trixbox-forums/open-discussion/how-eliminate-digium-tdmxxx-tdm22b-echo-audio-issues > > Brainspiral manages IP-based phone systems for dozens of clients. > We highly recommend Trixbox (http://trixbox.org) Appliances and > Aastra telephones (http://aastra.com). Systems running the highly > intuitive Asterisk phone software offer better features & advanced > configuration at a fraction of the cost.