All, I am trying to play an audible DTMF sound and vibrate the device when I send a DTMF tone to the server. I am using pjsua_cal_dial_dtmf() to send the tone I know it is working because I tested it with couple of voice mails and 1 800 numbers.. Every time I am in a call my audio player and my API to vibrate the device stops working. when I hang up and I use the same code it plays fine and vibrates the device as expected. Is there any limitations with PJSIP or am I doing the wrong thing? I am using PJSIP 1.2 and testing on iPhone 4, 4s with iOS 5. Best Regards, -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20120220/6ff4377e/attachment.html>