ChannelWeb is publishing a review of five VoIP systems. While not terribly helpful as a whole, the article discusses several aspects of choosing a VoIP system. The focus is on small systems for small business, 2-40 users or so. There are some helpful comments following the article.

One deficiency is that the article doesn’t really encompass the whole picture necessary for putting in VoIP. For example, most installers would consider using conventional PSTN phone lines or a T-1 connection for multiple lines, rather than attempt to use public IP connections for their “production” phone trunks.