Make sure there is v= header at least on the top level and then either c= header on the global level and o=, s= and t= on the media level.
Make sure there is v= header at least on the top level and then
either c= header on the global level and o=, s= and t= on the
media level.

SippySoft TT#:	SS-1698

sippy/b2bua,sippy/b2bua