Information Technology Reference
In-Depth Information
CHAPTER 3
Understanding the Cisco IP Phone
Concepts and Registration
You walk into the new corporate headquarters for Fizzmo Corp. On the top of each desk
is a Cisco 7945G IP Phone, glowing with a full-color display and two line instances. Smil-
ing, courteous agents are busy taking phone calls from callers excited to purchase the lat-
est Fizzmo wares. Samantha (located in the north corner) is checking her visual voicemail,
while Emilio (located in the south hall) is getting the latest weather report through an
XML IP phone service.
How did we get here? How do you take a newly constructed building and transform it
into a bustling call center? That's what this chapter is all about. We walk through the key
concepts and technologies used to build a Cisco VoIP network. By the time you are done
with this chapter, you will have all the conceptual knowledge you need to have in place
before you can move into the installation and configuration of the Cisco VoIP system.
The “Do I Know This Already?” quiz allows you to assess whether you should read this
entire chapter or simply jump to the “Exam Preparation Tasks” section for review. If you
are in doubt, read the entire chapter. Table 3-1 outlines the major headings in this chapter
and the corresponding “Do I Know This Already?” quiz questions. You can find the an-
swers in Appendix A, “Answers Appendix.”
Table 3-1
“Do I Know This Already?” Foundation Topics Section-to-Question Mapping
Foundation Topics Section
Questions Covered in This Section
Connecting and Powering Cisco IP Phones
1-2
VLAN Concepts and Configuration
3-8
Understanding Cisco IP Phone Boot Process
9
Configuring a Router-Based DHCP Server
10
Setting the Clock of a Cisco Device with NTP
11
IP Phone Registration
12
