On Thu, 13 Aug 2009, David Birnbaum wrote:
Zero is nice, but may not be feasible.
I would say "it works" means that your failure scenario may run from "zero", in which case the customer doesn't notice that you've lost half your trunking, to what I would consider "minor", which means that most of your calls stay up and perhaps dialtone/call setups fail for 10-20 seconds.
We can shutdown our NYC cluster and calls will stay up. The question was in response to geographic redundancy and BroadWorks. Yes, there are events outside the network that can cause issues. However this is greatly reduced with geographic redundancy on your appserver/softswitch. We wrote our own SIP video conferencing system from scratch, we have the inhouse programming resources to add in memory distributed database to one of the open source platforms, however we found that using something like BroadSoft saved us a lot of time and money. -Nathan