Cisco Voice Gateways and Gatekeepers

Cisco Voice Gateways and Gatekeepers

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Cisco Press

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Cisco Voice Gateways and Gatekeepers 4 out of 5 based on 0 ratings. 1 reviews.
Guest More than 1 year ago
As the title states, Gateways and Gatekeepers, you are immedialtely immersed in the functions of cisco gateways and gatekeepers. This book is intended for those who have prior VOIP knowledge as far as core principles of protocols used in VOIP and basic understanding of dial peers. It is strongly recommended that the reader pick up the fundamentals of Cisco VOIP before delving into this book as it moves at fast pace explaining the configurations. The author goes into great detail about configuration and case scenarios of the various types of VOIP setup (Ex. FXS, FXO, T1, E1, E&M). There are several illustrations that help in understanding the roles of devices in the various configurations explained. Although, I felt the book needed more diagrams through its entirety. The chapter on Dial Plans is invaluable to engineers currently planning their VOIP infrastructure. From design to implementation it will be a handy reference during the process. There are also great example outputs of debug commands which I found missing in other books that fall in the same category. The troubleshooting sections help when your VOIP network is already implemented but not fine tuned. They are each covered at the end of each section as opposed to covering them at the end of the book. This was a good idea from my perspective. As I skimmed through the book the first time I read it, I found many commands I didn¿t use before due to the fact that it was not explained in a concise way until I read the sections in this book. I also found invaluable show command tables explaining the signs to look out for when using these show commands in certain configurations. The one negative comment I have about this book is the lack of review for those readers that are a bit rusty when understanding VOIP. I think there should be a chapter or appendix section that briefly covers the fundamentals of VOIP just as a refresher for readers. Also, this book was listed as the only Cisco Press book recommended in preparation for the CCVP 642-452 GWGK exam. There needs to be more test questions at the end of each chapter and unless the book under normal retail comes with a disc, it needs one with flash cards or sample tests. Overall, I would definitely recommend this book if the reader intends to implement a VOIP infrastructure in their company, but I would strongly suggest getting additional preparation material if the book was purchased in preparation for the CCVP 642-452 GWGK exam.