[VoiceOps] Geographic redundancy
davidb at pins.net
Thu Aug 13 15:40:52 EDT 2009
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.
Any outage longer than that I would not consider acceptable (as part of the
five-nines we all aim for).
On Thu, 13 Aug 2009, Nathan Stratton wrote:
> On Thu, 13 Aug 2009, Mark Holloway wrote:
>> When you say "it works" - what is the impact to the customer?
>> On Aug 13, 2009, at 10:18 AM, Mark R Lindsey wrote:
>>> We've done it for several carriers, and it works. Supporting all the
>>> fault-tolerance scenarios can be extremely complex, but it's definitely
>>> achievable. It introduces a set of requirements on the network, and
>>> especially on your connectivity to subscribers.
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