The AVT WG is currently in WG last call of MIME type registration for RTP Payload format for H.224: http://www.ietf.org/internet-drafts/draft-ietf-avt-mime-h224-05.txt This document defines the application/h224 media type. Please provide any review comments at the latest by the 16th of February 2006. Thanks Magnus Westerlund AVT Chair