RTP re-invite is possible. The mess that is Cisco CallManager supports SCCP, SIP, H.323 and MGCP. Calls from anyone of those technologies to any other technology works with the signalling passed through the CCM server and RTP re-invites occur between the endpoints. So CDR works and scalability does not suffer.
I've been meaning to test to see if Asterisk supported this mode of operation, and you've saved me the trouble. I'd hate to predict the odds that such support would be added since IAX doesn't use RTP, but I'd love to see it anyway. And if I understood more than the basics of programming in C, I'd try it. Dan Matthew Boehm wrote: > If so, what is the "signalling" bandwidth usage in/out of asterisk in this > case? Even if the phones are connected directly to eachother, they still > have to pass some data to asterisk so asterisk still knows that the call is > up and has to know when the call goes away. We need to know this bandwidth > usage on a T1 because lets say it was 10Kbps, you could actually do a bunch > of calls on 1 T1 provided that all phones use canreinvite right? Nope, you've misunderstood. If these phones are connecting via SIP or IAX, and Asterisk is allowed to reinvite them to talk to each other, then Asterisk will be _completely_ out of the conversation. The only way that Asterisk would become involved again is if one of the phone users decided to transfer their end of the call. Given this, if you allow reinvites, you _cannot_ have accurate and complete CDR information. Many of us would like to see Asterisk support this mode of operation (reinvite only the media stream, not the control stream), and some of those many think it's actually possible... but there are others who feel that since Asterisk is not a SIP proxy it cannot be done. I am not in that group, I just don't have the time to try to implement it myself :-( In any case, you have two choices: avoid the bandwidth consumption on the Asterisk server's link, or have accurate CDR. _______________________________________________ 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 _______________________________________________ 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
