3.15 Extensions for ICE SDP Interworking and Multipart MIME Support

This section follows the product behavior described in endnote <72>.

User agents use multi-part MIME to convey multiple SDP parts and call context data in an INVITE request during session initialization. This document describes a method of using multi-part MIME to enable interoperability with SIP elements for which it cannot be determined in advance whether they support [IETFDRAFT-ICENAT-06] or [IETFDRAFT-ICENAT-19] or both.