nate:Fraktul: While you may be able to run VoIP services over TCNZs UBS network the SLAs of this product definitely do not support VoIP type service flows. Suggesting people run their business primary voice services over UBS without due diligence and without the end user being fully aware of exactly what they are getting is a tad irresponsible Nathan.
I agree with you completely - my point was more that you can run crystal clear VoIP over ADSL.
To clarify further, to keep all bases covered I recommended keeping a couple incoming phone lines/ISDN lines and run outgoing calls through VoIP - this way, in the event of an ADSL outage, customers can still call in, and you can still call out through the physical phone lines until the internet is back up again.
It's really up to the customer as to the balance of lower line charges with VoIP vs keeping backup physical phone lines.
Sorry if my comments were misleading, I'm certainly not trying to lead anyone astray :)
Overall, it's a mix of a cheap VOIP (PAP2Ts are $80 or so?) and a decent PABX. One day I may shell out for the IP add-on card to the Aria so it is more integrated but it is a huge cost by comparison to PAP2Ts.
I didn't get into detail on the IP card for the Aria because of the cost ($800). PAP2T is working fine for the moment but I can see the logic of SPA3000.