Either your configs are wrong or the card is faulty. You should have crystal clear calls.
Thanks, Steve Manish Sapariya wrote: > Hi List, > > I am using asterisk to test another asterisk/voip software, by > generating user agent on asterisk which can be used to place > calls to unit under test. I have also tests in which I place > calls over PSTN lines and receive them back on PSTN line and > verify the results. > > Everything is fine, except some times asterisk sees busy tone > on callee side when the caller side plays the audio file, for > pstn call. To understand the problem I ran simple test by using > a loopback cable from fxs to fxo, repeatedly. What I found is that > the received file indeed was so distorted and had some busy tone > like sounds that asterisk identified it as busy tone and hanged > up the line. > > There are following questions that I am trying to answer: > - Why the busy like distortion is generated on the PSTN line? > - When I recorded the wav files to see the actual quality of > the voice I found them not very good. My assumption was that > the loopback setup should give the best result possible. Did > I misunderstand anything? > - Will PSTN hardware, I have digium cards, cause such intermittent > noise generation when use repeatedly to place calls. > > Any ideas? > > Thanks and Regards, > Manish > > > > _______________________________________________ > --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 > > > _______________________________________________ --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
