Early adopters who want to update their original UC solution or first time UC buyers may find it difficult to keep up with evolving UC feature sets, so this document will offer an overview of the current “top ten” requirements to consider for a premise-based UC solution. Along the way, mandatory and optional features will be called out and an appendix will include a case study of a multi-national enterprise that has deployed a UC solution. At the conclusion of this guide, UC solutions from ShoreTel will be objectively assessed, and a case study from a multi-national enterprise will corroborate the ShoreTel solution assessment.