We have a VPN under less than perfect conditions to Mexico.
The link goes down a lot, and by now we let the guys in Mexico move the VPN point from one provider to another, in a attempt to keep the service up as much as posible.
But when the link is up, with around 300 Ms or less, the voice quality is perfect.
Normally, we have 4 to six lines busy all the time.
It should work perfect with such a good network.
NAd unless you have some bandwith hogs, you may need the QOS to operate.
Best luck, and I do not have any opinion of sysmaster.
Well I take it back. I spoke with some sales people. I agree that theyare the pushiest one on the VOIP market.