Olle, On Fri, 2004-01-09 at 22:28, Olle E. Johansson wrote: > Isn't the definition of a b2bua that the media streams pass it? > back-to-back-user-agent.
Frankly, I am really not sure. My understanding has been that a b2bua would act as a UAC to both endpoints - meaning it engages in some sort of offer/answer dialog when it comes to media. I am not sure, if that implies to reroute a media stream through a local proxy. So far I have been assuming it does not. > Anyway, not to be picky, Asterisk by default wants to be in the media > path. There are ways to release the signalling and media path > back to the clients, with canreinvite=yes, but that's not the default behaviour. Afaik, in that case asterisk would act as a user agent server and redirect the calling party another URI. Imagine the following scenario: UAC A -----> * --------> UAC B Assume * wants to rewrite the callerid (the SIP "To:" header field in this case) without touching the media stream. Forcing UAC A to re-INVITE UAC B would not help in this case. Forcing the media stream through the * box however does add the known zoo of problems (latency, bandwith costs, scalability, ...). > A SIP proxy like SIP express router from iptel.org fits your > description better. And yes, SER works together with Asterisk. On the SER list I learned, that (unlike asterisk) SER is stateless with regards to a call. However, if you stick with the example from above, state appears to be a prerequisite for rewriting the SIP header, because SER would need to map back any responses from the called party to the original "To:" header before forwarding them back to the calling party. Thilo _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
