Hello, I tested the 1.x svn branch the problem got worst. when --no-vad define or not the issue occurred. when define --no-vad pjsip press hold the other sip phone no music at all when i unhold/hold again the sip phone got clear music. oh ya and also i unable to make call thru this version. could u test the hold issue? Thanks and Regards, MingHon -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20110912/7ceea1af/attachment.html>