Hi All, Can please clarify on the below query Do we need to include 1.refresh timer header ( X header) In INVITE request during VoLTE /VT call. THanks, Madan -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://sipforum.org/pipermail/discussion/attachments/20160115/c5c9f1bb/attachment-0002.html>