On 23 Jul 2008, at 14:59, Benny Prijono wrote: > On Wed, Jul 23, 2008 at 12:26 PM, Ruud Klaver <ruud at ag-projects.com> > wrote: > > To support user confirmation scenario, I'm thinking that application > > could just answer the re-INVITE with a provisional SDP (e.g. with > > "a=recvonly") in 200, and then ask for user confirmation about the > > modification, and then send re-INVITE with another SDP to activate > > or deactivate the changes depending on user approval. > > A creative workaround, although I'm not sure all endpoints support > this. Also, it does not really work when using MSRP. > > > A little bit off topic, do you have MSRP? I've always wondered if > MSRP is really useful and in widespread use. The TCP based transport > sounds like inviting problems with NAT. > > -benny Working on it. MSRP relays (RFC 4976, http://msrprelay.org) should aid in MSRP NAT traversal. Ruud Klaver AG Projects