There are a few good resources that will help you succeed with this exam; the list here is not complete by any means. You should choose the resources that will best help you learn the topics.
The Cisco Learning Network is a website dedicated to Cisco Certifications. Here you’ll find the exam that Cisco offers and the other resources. Some of the areas are Study groups, Questions and answers, and general help with the Certification process. In order to fully utilize this site you will need to create a login.
Implementing Cisco Unified Communications Manager Part 1(CIPT 1), Authorized Self-Study Guide: The core knowledge you learn from this book will help with the current exam.
Voice over IP Fundamentals, 2nd Edition: Chapters 8, 11, and 12 will provide good information on QoS, SIP, and H.323.
QoS Exam Certification Guide, 2nd Edition: This book will provide valuable information on QoS.