Problem solved. :) I was adding to the pstn line a gain of 6 DB for both sides. It has to be less than zero. After that the echo almost disappeared.
2010/1/21 Alexandre Rodrigues <alex...@gmail.com> > Hello all, > > I have a Linksys spa3102 with one FXS and one FXO port. > > The problem is that I have a lot of echo when using the fxo port, the sound > is of very low quality. > So, since I am passing from a FXO port to a SIP channel I ask: > > is there any Sip echo canceler software for asterisk?? > > Thanks in advance. > > Alex >
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