Voice over IP first-step : [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 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. Cover......Page 1 Contents......Page 11 Introduction......Page 18 Chapter 1 Touring the History Museum of Telephony......Page 24 Dissecting a Telephony Network......Page 25 The Public Switched Telephone Network: The Phone System That You Grew Up With......Page 28 Private Branch Exchanges: How Big Businesses Talk......Page 30 Key Systems: How Small Businesses Talk......Page 31 Ringing, Dial Tone, and Other Bells and Whistles......Page 32 Supervisory Signaling......Page 33 Address Signaling......Page 36 Information Signaling......Page 38 Case Study: Your Turn to Put the Pieces in Place......Page 44 Design Diagram for XYZ Company:......Page 46 Design Description for XYZ Company:......Page 47 Rationale for a VoIP Solution:......Page 48 Suggested Solution......Page 49 Chapter Summary......Page 50 Chapter Review Questions......Page 51 What You Will Learn......Page 55 Chapter 2 Making Waves: Turning Your Voice into 1s and 0s......Page 56 Chopping Your Voice into “Byte”-Size Pieces......Page 57 Squeezing Your Voice into a Smaller Package......Page 63 Deciding How Much Bandwidth Is Enough......Page 70 Step 1: Calculating Erlangs......Page 71 Step 3: Calculating the Number of Required Trunks......Page 72 Step 4: Calculating the Amount of Required Bandwidth......Page 74 Case Study: Your Turn to Choose the Bandwidth......Page 75 Case Study Suggested Solution......Page 77 Chapter Summary......Page 80 Chapter Review Questions......Page 81 What You Will Learn......Page 83 Competing with the Reliability of Existing Phone Systems......Page 84 Replacing PBX Trunks: Out with the Old, In with the New......Page 89 Connecting a Router to a Phone Line......Page 91 Connecting a Router to a Digital Circuit......Page 95 Voice over IP in the Home......Page 108 Case Study: Your Turn to Put the Pieces of the Puzzle Together......Page 110 Design for XYZ Company:......Page 111 Suggested Solution......Page 112 Chapter Summary......Page 113 Chapter Review Questions......Page 115 What You Will Learn......Page 117 Chapter 4 Meet the “Brain” of the Voice over IP Network......Page 118 Replacing Your Old Phone Switch with Cisco CallManager......Page 119 There Is Power in Numbers: Grouping Cisco CallManagers Together......Page 123 Designers’ Challenge: Placing Cisco CallManagers in the Network......Page 125 Single-Site Model......Page 126 Centralized Call Processing Model......Page 127 Distributed Call Processing Model......Page 130 Clustering over the WAN Call Processing Model......Page 131 Setting Guidelines for Who Can Make Calls......Page 133 Replacing Old Phones with IP Phones......Page 138 Inline Power......Page 139 CODECs......Page 141 Additional Switch Port......Page 142 XML Support......Page 143 Auxiliary VLAN......Page 144 Line/Speed Dial Buttons......Page 145 Cisco 7902G......Page 146 Cisco 7905G and 7912G......Page 147 Cisco 7940G and 7960G......Page 148 Cisco 7970G and 7971G-GE......Page 150 Cisco IP SoftPhone......Page 151 Cisco IP Communicator......Page 152 Cisco 7920......Page 153 Cisco 7936......Page 154 Conferencing......Page 155 Music on Hold......Page 156 Auto Answer......Page 157 Immediate Divert to Voice Mail......Page 158 Call Pickup/Group Call Pickup......Page 159 The Cone of Silence: Securing Voice......Page 160 Integrity......Page 161 A Picture Is Worth a Thousand Words: Adding Video to Voice Calls......Page 162 Cisco CallManager in the “Express” Lane......Page 166 Case Study: Your Turn to Do an Extreme Phone System Makeover......Page 169 Suggested Solution......Page 172 Chapter Review Questions......Page 174 What You Will Learn......Page 177 Gateway Protocols: The Languages of Love......Page 178 The Tried and True Language: H.323......Page 180 H.323 Pieces and Parts......Page 181 H.323 Call Types......Page 183 Cisco’s Very Own: MGCP......Page 186 MGCP Components......Page 187 MGCP Concepts......Page 188 The New Kid on the Block: SIP......Page 189 Case Study: Your Turn to Be Trilingual......Page 193 Suggested Solution......Page 195 Chapter Review Questions......Page 196 What You Will Learn......Page 199 Chapter 6 Why Quality Matters......Page 200 Too Many Swimmers in the Bandwidth Pool......Page 201 Being Politically Incorrect: Treating Special Traffic in a Special Way......Page 202 Classification......Page 204 Congestion Management......Page 205 Policing and Shaping......Page 206 Giving Voice Top Priority......Page 207 Expedited Forwarding......Page 210 Assured Forwarding......Page 211 Class Selector......Page 212 Feeling a Little Congested?......Page 215 First-In, First-Out (FIFO) Queuing......Page 216 Weighted Fair Queuing (WFQ)......Page 217 Priority Queuing (PQ)......Page 219 Class-Based Weighted Fair Queuing (CB-WFQ)......Page 220 Low Latency Queuing (LLQ)......Page 221 Catalyst-Based Queuing......Page 222 Throwing Packets out the Window......Page 223 Random Early Detection (RED)......Page 224 Explicit Congestion Notification (ECN)......Page 226 Setting Speed Limits on Traffic......Page 228 Shaping Frame Relay Networks......Page 233 Doing More with Less (Bandwidth)......Page 235 Automatically Configuring QoS with AutoQoS......Page 238 Case Study: Your Turn to Use Your New “Quality of Service” Tools......Page 239 Suggested Solution......Page 241 Chapter Summary......Page 242 Chapter Review Questions......Page 244 What You Will Learn......Page 247 Leave a Message at the Beep: the Cisco Answer to Unified Messaging......Page 248 Which Came First, the Voice Mail System or the CCM?......Page 249 One-Stop Messaging......Page 250 Advanced Messaging with a PBX......Page 251 Have Your People Call My People: Creating a Conference Call......Page 252 Your Call Is Very Important to Us: The Cisco Answer to Call Centers......Page 256 Cisco IPCC Express Edition......Page 257 Cisco IPCC Enterprise Edition......Page 258 Case Study: Your Turn to Pick Add-On Features......Page 259 Chapter Summary......Page 262 Review Questions......Page 263 Appendix A: Answers to Chapter Review Questions......Page 268 Appendix B: Next Steps: Where Do I Go From Here?......Page 286 B......Page 290 C......Page 291 F......Page 293 H......Page 294 K......Page 295 M......Page 296 O......Page 297 P......Page 298 R......Page 299 S......Page 300 T......Page 301 V......Page 302 W......Page 303 A......Page 306 B......Page 307 C......Page 308 D......Page 312 E......Page 313 G......Page 314 I......Page 315 J–L......Page 316 M......Page 317 N......Page 318 O–P......Page 319 Q......Page 320 S......Page 321 T......Page 323 U–V......Page 324 W–X......Page 325

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.

We use either a telephone or e-mail for much of our day-to-day communication. 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). This title serves as an introduction to the world of VoIP networks.