If you're interested in building a commercial business with
PBX in a Flash or merely are considering an IP telephony deployment for your company, we've stumbled across some guides from Shoretel that are a must read. It'll also give you a good sense of how competitive
PBX in a Flash really is. In terms of feature set, it's a No Brainer. What separates our product from the commercial ones are these five dealer-supplied intangibles: network knowledge, project management, system design, service, and support. That's your part.
If you ignore the typical Shoretel sales pitch, there is a vast amount of useful material in all three books:
Unified Communications Pocket Guide - Covers the process of planning, deploying, and managing an IP phone system
IP Telephony from A-Z - The Complete IP Telephony eBook - Provides pre-decision questions and post-decision planning and implementation tips for IP telephony
IP Telephony Executive Guide 2007 - The latest best practices to design, implement and deploy a successful IP telephony system
All three books in PDF format are free to download after registration below with (any) name, (any) email address, and (any) phone number:
http://www.shoretel.com/resources/guides/