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 Language: H.323
H.323 Pieces and Parts
H.323 Call Types
Cisco's Very Own: MGCP
MGCP Components
MGCP Concepts
Making the MGCP Network More Fault Tolerant
The New Kid on the Block: SIP
Case Study: Your Turn to Be Trilingual
Suggested Solution
Chapter Summary
Chapter Review Questions
What You Will Learn
Chapter 6 Why Quality Matters
Too Many Swimmers in the Bandwidth Pool
Being Politically Incorrect: Treating Special Traffic in a Special Way
Classification
Marking
Congestion Management
Congestion Avoidance
Policing and Shaping
Link Efficiency
Giving Voice Top Priority
Default
Expedited Forwarding
Assured Forwarding
Class Selector
Feeling a Little Congested?
First-In, First-Out (FIFO) Queuing
Weighted Fair Queuing (WFQ)
Priority Queuing (PQ)
Class-Based Weighted Fair Queuing (CB-WFQ)
Low Latency Queuing (LLQ)
Catalyst-Based Queuing
Throwing Packets out the Window
Random Early Detection (RED)
Weighted RED (WRED)
Explicit Congestion Notification (ECN)
Setting Speed Limits on Traffic
Shaping Frame Relay Networks
Doing More with Less (Bandwidth)
Automatically Configuring QoS with AutoQoS
Case Study: Your Turn to Use Your New Quality of Service Tools
Suggested Solution
Chapter Summary
Chapter Review Questions
What You Will Learn
Chapter 7 VoIP Supporting Roles
Leave a Message at the Beep: the Cisco Answer to Unified
Messaging
Which Came First, the Voice Mail System or the CCM?
One-Stop Messaging
Advanced Messaging with a PBX
Have Your People Call My People: Creating a Conference Call
Your Call Is Very Important to Us: The Cisco Answer to Call Centers
Cisco IPCC Express Edition
Cisco IPCC Enterprise Edition
Case Study: Your Turn to Pick Add-On Features
Suggested Solution
Chapter Summary
Review Questions
Appendix A Answers to Chapter Review Questions
Appendix B Next Steps: Where Do I Go From Here?
Glossary
Index
