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.
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