Synopses & Reviews
Your first step into the world of IP telephony
- No IP telephony experience required
- Includes clear and easily understood explanations
- Makes learning easy
Your first step to the world of IP telephony begins here!
- Learn how voice and data communications merge in voice-over-IP technology
- Use this reader-friendly guide to understand the benefits of this technology
- Explore real-life applications and theories through case studies in every chapter
Welcome to the world of voice over IP
We use either a telephone or e-mail for much of our day-to-day communication. Today, these two worlds are merging, and companies can place phone calls over their existing data network infrastructures using a technology called voice over IP (VoIP).
No prior experience with VoIP technology is required
Voice over IP First-Step is anyone’s introduction to the world of VoIP networks. The concepts in this book are presented in plain language, so you don’t need in-depth background knowledge to comprehend the technologies covered. If you work with data networks, if you work with telephony networks, if you’re a home user interested in how VoIP can reduce your monthly phone bill, or if the concept of VoIP simply intrigues you, this book is for you.
Review
"This book is easily read and provides a wealth of knowledge...this reference is an invaluable resource, and is written for all levels. This book has a tremendous wealth of knowledge. "
- Carlyle J. Melancon, Jr., Senior Technical Instructor
Synopsis
Your First Step to the World of IP Telephony
Learn Voice over IP basics with this reader-friendly guide No previous knowledge required to learn the basics of this advancing telephony technology Learn from standard features from the First-Step Series like case studies, tips, pre- and post- chapter reviews Voice over IP First-Step is anyone's introduction to the world of Voice over IP (VoIP) networks. Voice over IP technology is advancing rapidly across enterprise and smaller networks due to the cost savings and user benefits that this emerging technology provides. Voice over IP First-Step will serve as a first step for many of those impacted by this significant market trend. No prior experience with VoIP technology is required, and the book's conversational style and use of Case Studies, Tips, Notes, Alerts, Chapter Objectives, Chapter Summaries, and other elements will help the reader understand and retain basic VoIP concepts and theories that are presented throughout the book.
Synopsis
Your first step into the world of IP telephony
- No IP telephony experience required
- Includes clear and easily understood explanations
- Makes learning easy
Your first step to the world of IP telephony begins here
- Learn how voice and data communications merge in voice-over-IP technology
- Use this reader-friendly guide to understand the benefits of this technology
- Explore real-life applications and theories through case studies in every chapter
Welcome to the world of voice over IP
We use either a telephone or e-mail for much of our day-to-day communication. Today, these two worlds are merging, and companies can place phone calls over their existing data network infrastructures using a technology called voice over IP (VoIP).
No prior experience with VoIP technology is required
Voice over IP First-Step is anyone's introduction to the world of VoIP networks. The concepts in this book are presented in plain language, so you don't need in-depth background knowledge to comprehend the technologies covered. If you work with data networks, if you work with telephony networks, if you're a home user interested in how VoIP can reduce your monthly phone bill, or if the concept of VoIP simply intrigues you, this book is for you.
About the Author
Kevin Wallace, CCIE® No. 7945, is a certified Cisco Systems® instructor and a full-time instructor for Thomson/NETg. With15 years of Cisco networking experience, Kevin holds a bachelor of science in electrical engineering from the University of Kentucky. Kevin is also a CCVP™, CCNP®, and CCDP® with three Cisco IP Telephony specializations.
Table of Contents
Introduction
Chapter 1 Touring the History Museum of Telephony
Dissecting a Telephony Network
The Public Switched Telephone Network: The Phone System That You Grew Up With
Private Branch Exchanges: How Big Businesses Talk
Key Systems: How Small Businesses Talk
Ringing, Dial Tone, and Other Bells and Whistles
Supervisory Signaling
Address Signaling
Information Signaling
Case Study: Your Turn to Put the Pieces in Place
Design Diagram for XYZ Company:
Design Description for XYZ Company:
Rationale for a VoIP Solution:
Suggested Solution
Chapter Summary
Chapter Review Questions
What You Will Learn
Chapter 2 Making Waves: Turning Your Voice into 1s and 0s
Chopping Your Voice into “Byte”-Size Pieces
Squeezing Your Voice into a Smaller Package
Deciding How Much Bandwidth Is Enough
Step 1: Calculating Erlangs
Step 2: Determining the Grade of Service
Step 3: Calculating the Number of Required Trunks
Step 4: Calculating the Amount of Required Bandwidth
Case Study: Your Turn to Choose the Bandwidth
Case Study Suggested Solution
Chapter Summary
Chapter Review Questions
What You Will Learn
Chapter 3 Paving the Pathway to a Voice over IP Network
Competing with the Reliability of Existing Phone Systems
Replacing PBX Trunks: Out with the Old, In with the New
Connecting a Router to a Phone Line
Connecting a Router to a Digital Circuit
Voice over IP in the Home
Case Study: Your Turn to Put the Pieces of the Puzzle Together
Design for XYZ Company:
Suggested Solution
Chapter Summary
Chapter Review Questions
What You Will Learn
Chapter 4 Meet the “Brain” of the Voice over IP Network
Replacing Your Old Phone Switch with Cisco CallManager
There Is Power in Numbers: Grouping Cisco CallManagers Together
Designers’ Challenge: Placing Cisco CallManagers in the Network
Single-Site Model
Centralized Call Processing Model
Distributed Call Processing Model
Clustering over the WAN Call Processing Model
Setting Guidelines for Who Can Make Calls
Replacing Old Phones with IP Phones
Inline Power
CODECs
Additional Switch Port
XML Support
Auxiliary VLAN
Softkeys
Line/Speed Dial Buttons
Cisco 7902G
Cisco 7905G and 7912G
Cisco 7910G+SW
Cisco 7940G and 7960G
Cisco 7970G and 7971G-GE
Cisco IP SoftPhone
Cisco IP Communicator
Cisco 7920
Cisco 7936
Selecting Features for IP Phones
Conferencing
Annunciator
Transcoding
Music on Hold
Speed Dial and Abbreviated Dial
Auto Answer
Call Forward
Direct Transfer
Call Join
Immediate Divert to Voice Mail
Multilevel Precedence and Preemption
Malicious Call Identification
Call Park
Call Pickup/Group Call Pickup
Call Back
Barge and Privacy
The Cone of Silence: Securing Voice
Identity
Integrity
Privacy
A Picture Is Worth a Thousand Words: Adding Video to Voice Calls
Cisco CallManager in the “Express” Lane
Case Study: Your Turn to Do an Extreme Phone System Makeover
Suggested Solution
Chapter Summary
Chapter Review Questions
What You Will Learn
Chapter 5 Speaking the Gateways’ Languages
Gateway Protocols: The Languages of Love
The Tried and True