Hi, We are using PJSIP to handle Multiple Outbound calls, Configured 32 calls in concurrent and every call needs to play audio .wav file and send RTP packets to remote end. In this scenario, upto 6 calls in concurrent the remote end receiving the RTP packets properly and playing the content without any delay, but for 32 calls, the audio at the remote end is getting delayed like for 15sec content is playing upto around 30 sec. We are suspecting it is due to problem in audio device, in 1 stream time (in wmme_dev_thread) the pjsip reading 32 files and forming RTP packet and sending to other end. The OS we are using is Winxp 32 bit desktop system. And one more doubt is what the reason to use waveOutWrite API in device playback. Is it require to open device in multiple times with multiple device threads. Anyone plz suggest me where the problem is. Thanks in advance for support. Prasanna Kumar.N, -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20130222/47531944/attachment-0001.html>