The second edition of Cisco Voice Over IP (CVOICE) provides readers with all the critical information needed to implement and support data and voice integration solutions at the network-access level. In addition, this book prepares the reader for the CVOICE certification exam 642-432, which applies to multiple Cisco IP Telephony Specialist certifications and the Cisco Certified Voice Professional (CCVP) certification. The book is based on the 5.0 curriculum, and has extra coverage on particularly tough areas of that course, such as H.323 gateway/gatekeeper and QoS configuration. This book will serve readers as a valuable study aid and an invaluable theory, configuration, and troubleshooting reference. Coverage starts with a review for readers new to voice technologies and continues with in-depth information on implementation, concepts and protocols, call control models available, roadblock and troubleshooting strategies, and QoS issues. The book also expands beyond the curriculum to cover topics such as WRR, AutoQoS on a Catalyst switch, LFI, using MQC to configure classification, marking, LLQ, WRED, policing, and shaping. How does the book differ from the previous edition? It includes updated coverage of voice technologies, IOS version 12.3 updates including AutoQoS, H.323 enhancements, MGCP enhancements, and SIP enhancements, and practical editorial elements like hands-on lab exercises and configuration examples are given greater emphasis.