The document provides a buyer's guide for SMB phone systems. It outlines four key aspects for buyers to consider: 1) buyer types, 2) product requirements, 3) cost considerations, and 4) vendor relationships. There are three main buyer types - basics buyers prioritize low cost, fast featurists want advanced features at low cost, and little enterprisers need customized advanced features. The guide describes basic and advanced features to consider and notes that follow-me and desktop integration are top advanced interests. It also highlights that low cost is the top purchasing factor and that support is important.