There are two common types of echo. Accoustic Echo: This is caused by microphone picking up audio from the speaker. This echo cannot generally be removed by echo cancelers. The solution to accoustic echo is to prevent the microphone from picking up audio from the speaker (or handset or earpiece).
Line Echo: This is caused by your outgoing audio “reflecting” off the far end of an analog line. This happens in all calls with a 2-wire analog portion, however in analog and digital (aka PRI) the delay in echo is so small we can’t perceive it. VoIP has far larger latencies so we can hear the echo. This type of echo MUST be canceled out before the audio is converted to VoIP. From: asterisk-users-boun...@lists.digium.com [mailto:asterisk-users-boun...@lists.digium.com] On Behalf Of Anurag Rana Sent: Wednesday, June 25, 2014 2:36 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [asterisk-users] Echo Cancellation when calling from softphone to mobile. Is there any Software solution? On Wed, Jun 25, 2014 at 11:38 PM, Mitul Limbani <mi...@enterux.in<mailto:mi...@enterux.in>> wrote: Put line side echo cancelation chip on ur PRI card. On 25-Jun-2014 10:35 PM, "Anurag Rana" <anuragrana31...@gmail.com<mailto:anuragrana31...@gmail.com>> wrote: Hi, I am using Twinkle to call mobile phone but there is too much noise on the mobile user's end. Mobile user's voice is echoed back to user. While on twinkle end everything is fine. Using Asterisk 11. Please suggest some way to mitigate the problem. Thanks. -- Anurag Rana http://newbie42.blogspot.in/ On the trampoline of life's experiences, Striving towards a saintly life in the midst of these materialistic turbulences. -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello 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 -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- Anurag Rana http://newbie42.blogspot.in/ On the trampoline of life's experiences, Striving towards a saintly life in the midst of these materialistic turbulences.
-- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
