SUMMARY: [asterisk-biz] Does VoIP Really Work for Serious Business?

[James Sharp]

>
> No, it is all about jitter.  Latency is irrelevant unless it is above 
> 150-200ms.  Rapidly changing latency (aka Jitter) is what kills VoIP quality 
> because the echo cancelers  can't train up properly.
>

I'd say closer to 800-900ms.  I run 500-600ms all the time over satellite 
with no loss of quality or intelligibility.  Your hearing/speaking timing 
quickly adapts to it.