Ordinarily, I do not shill for vendor-written VoIP white papers. The sales and marketing imperatives are bound to overshadow any objective insights. In short, there is an end game with these things. Plus, you already hear from these people. I'd like to think you've come to this corner of the Blogosphere for our moo goo filter.
That said, I've just downloaded and read "Selecting A VOIP Solution: The Enterprise Edge," a new white paper from Quintim Technologies. Before the eight-page PDF documentcloses the sale, sort of speak, there's a well-considered treatment on the pitfalls of low-end gateways, as well as router-based high-end solutions.
Before you download the document, you'll have to register first. But that's understandable. No harm done.