Voice over IP first-step

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
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