[OpenSER-Devel] [Serdev] Possible bug in the tm module in the presence of packet loss/branches

[Maxim Sobolev]

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. 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.

Regards,
-- 
Maksym Sobolyev
Sippy Software, Inc.
Internet Telephony (VoIP) Experts
T/F: +1-646-651-1110
Web: http://www.sippysoft.com