Hi All, I am using simple_pjsua app. Incoming and outgoing call is working fine. But echo is coming at other end. I suspect echo cancellation is not working properly. In code for Speex codec(PJMEDIA_HAS_SPEEX_AEC) echo cancellation flag is defined, But for PCMA/PCMU codec, I am unable to find any echo cancellor. Please help me! With Best Regards, Vijay Pratap Singh VVDN Technologies Pvt Ltd Cell: +91 8512078585 | Skype : vijayp888 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20151211/f05132bb/attachment.html>