Requirements gathering processes should be subject to a well-structured process. Typically, it all starts with commercial engagements, which, most likely, you will not be involved with, right from the start. However, Unified (or Universal) Communications are a vastly complex world that require considerable skills, and you should expect the sales overlays to involve technical resources in the discussion quite early. This is where you will step in and expect to become the enabler for several key aspects in the project's life cycle.
Collecting requirements and translating/correlating these into an infrastructural design and project plan will require considerable time and effort. It is best to stay organized and rely on resources and documents, which will help keep the information in good order.
If you are a Microsoft Partner, an invaluable resource to help organize your work is the Microsoft Lync Deployment Planning Services (available at http:/...