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Posted July 4, 2011
only secondarily a study guide for the exam
The book is largely a discussion of CUC and VoIP and QoS, and only secondarily meant as a study guide for the CCNP voice exam. To wit, the review questions at the end of each chapter, which presumably are to focus you on the retention of material for the exam, are cursory. This differs from another book from Cisco Press which I recently reviewed, CCDA 640-864 Official Cert Guide (4th Edition). The latter is explicitly meant as a study guide for its exam, and only afterwards as an exposition of its topic.Was this review helpful? Yes NoThank you for your feedback. Report this reviewThank you, this review has been flagged.
The current text attests to the importance and intricacy of supporting voice messages with Cisco equipment. The latter is not confined to routers and switches. Chapter 3 is devoted to showing how terminal leaves on the network, in the form of phones made by Cisco that use IP trafficking as their communication mechanism, can be hooked up and managed. These phones take the form of wired handsets like the 7906G and the wireless 7921G. But the emphasis is on wired models for the office environment. The reader might want to peruse the images of the models. They show useful features, and the text describes some, like colour screens and wideband audio. The latter is a distinct improvement over the default narrowband encoding/sampling used for voice only messages, and allow the playing of music, for example, with much better fidelity.
What is also interesting in Chapter 3 is the mention of conference stations. These are high end multiuser speaker phones, demonstrating that Cisco is moving into a field traditionally dominated by Polycon.
The administration of the IP phones involves issues like those of general purpose computers on a network. For example, an IP phone can be assigned an IP address via a static IP setup, which involves typing the address at the phone itself. Or DHCP can be used.
Chapters 4 and 5 on dial plans are where issues arise that are specific to national and international phone messaging, as distinct to purely Internet messages. One key idea that can be implemented with Cisco equipment is the integration of private and public numbering. Here, tasks like removing or adding area codes or removing or adding prefixes arise. At least at the level of understanding what has to be done, these might be easier to follow than the intricacies of IP message formatting, for which most people do not directly encounter. Whereas the removing or adding of area codes or prefixes is more intuitive.
The CD that comes with the book can be useful in its video demos of network arrangements.