voip in australia, page-31

bbloff in one way or another they (or their provider) will have to deal with the large internet traffic for the voip calls, when the end user makes a Voip phone call ENG would be sending and receiving approx the same amount of that data as the customer, then multiply this by the amount of calls being made simultaneously by all customers.

So overall they would need access to decent internet bandwidth, I couldn't even guess at what type of link (100Mb - 1Gb ???) and I'm involved in IT.