Hi, A question about the callback functions used in these ports. Are snd_rec_cb and snd_play_cb callbacks in sound_port equivalent to ec_put_frame and ec_get_frame callbacks in the echo_port? Thanks! BR, Rahul -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20140822/b129059e/attachment.html>