Book excerpt: CCVP CVOICE Quick Reference (Digital Short Cut) Kevin Wallace, CCIE No. 7945 ISBN-10: 1-58705-824-3 ISBN-13: 978-1-58705-824-0 As a final exam preparation tool, the CCVP CVoice Quick Reference, Second Edition provides a concise review of all objectives on the CVoice exam (642-436). This digital Short Cut provides you with detailed, graphical-based information, highlighting only the key topics in cram-style format. With this document as your guide, you will review topics on foundational elements of VOIP calls, the description of dial plans, and the implementation of gateways, gatekeepers, and IP-IP gateways. This fact-filled Quick Reference allows you to get all-important information at a glance, helping you focus your study on areas of weakness and to enhance memory retention of essential exam concepts.