At 15:37 12/03/2008, Maxim Sobolev wrote: >Dan Pascu wrote: >> Anyway, examples are many and I'm sure people can even find more practical >> ones. The main reason for all of them being possible, is the fact that a >> CANCEL is no longer really canceling the call under these circumstances, >> and that the user is stripped from it's ability to control if a call >> should end or not before being setup, by random conditions (network >> packet loss) or purposeful abuses of the protocol behavior. > >All this has nothing to do with the SIP, really. It just illustrates the >point that SIP proxy is bad choice for real-time VoIP accounting.
That's a very true statement indeed. In fact a PROXy can server as an aPROXimation of what's going on and that's it. > If you >use B2BUA, all those concerns go away, as you will get two separate SIP >calls, so that your ingress call is isolated from any issues with >egress, such as packet loss and so on. My most favorite choice is producing reliable accounting data from PSTN gateways. In the end that's where the paid-for service is provided from, and it can include most complete data (including Q.931 error causes if you wish, and media QoS statistics) -jiri >Regards, >-- >Maksym Sobolyev >Sippy Software, Inc. >Internet Telephony (VoIP) Experts >T/F: +1-646-651-1110 >Web: http://www.sippysoft.com >_______________________________________________ >Serdev mailing list >[EMAIL PROTECTED] >http://lists.iptel.org/mailman/listinfo/serdev -- Jiri Kuthan http://iptel.org/~jiri/ _______________________________________________ Devel mailing list Devel@lists.openser.org http://lists.openser.org/cgi-bin/mailman/listinfo/devel
