Hi all, I had some problems to implement the onDtmfDigit callback using the pjsua2 c++ API. Long story short: If the optimization level is turned to off in user.mak (-O0) the callback is triggered if it's on it isn't. Trying the same using the native C API works. The callback on_dtmf_digit is called every time. Compiler version is gcc 4.9.1 Has anyone experienced similar behaviour? Is this a bug in the pjsua2 implementation? cheers, Stefan -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20140912/5d4bbcb6/attachment.html>