Foreword | p. xix |
Acknowledgments | p. xxi |
Introduction | p. 1 |
Topics Covered | p. 3 |
Telephony Basics | p. 4 |
Quality of Service | p. 4 |
Cisco Voice Concepts | p. 5 |
Network Planning | p. 5 |
Network Implementation | p. 5 |
Products | p. 5 |
Who Should Read This Book? | p. 6 |
Level of Detail | p. 6 |
Packetized Voice Overview | p. 7 |
Introduction | p. 8 |
Business Drivers | p. 8 |
Basic Transport of Voice over an IP Network | p. 9 |
Voice-to-Data Conversion | p. 9 |
Raw Data to IP Conversion | p. 10 |
Transport | p. 11 |
IP-to-Data Conversion | p. 11 |
Conversion from Data Back to Voice | p. 11 |
Voice over IP Basics | p. 11 |
Voice Compression | p. 12 |
Phone Number Mapping | p. 13 |
Call Leg Identification | p. 13 |
Session Protocol | p. 13 |
Enabling Technologies | p. 14 |
Hardware Advances | p. 14 |
Software | p. 17 |
Protocols | p. 22 |
Management Issues | p. 25 |
Availability and Uptime | p. 26 |
Configuration | p. 26 |
Dial Plans | p. 27 |
Call Detail Recording | p. 27 |
Monitoring and Diagnostics | p. 27 |
Performance Management | p. 28 |
Cisco Voice-Enabled Routers | p. 28 |
Cisco 2600 | p. 29 |
Cisco 3600 | p. 29 |
Cisco AS5300 | p. 29 |
Cisco 2600/3600 Voice/Fax Network Module | p. 30 |
Cisco AS5300 Voice/Fax Carrier Card | p. 30 |
Voice Concepts for Data Engineers | p. 31 |
Introduction | p. 32 |
Analog Telephony | p. 32 |
Basic Telephone Technology | p. 32 |
Basic Cabling and Connectors | p. 32 |
Voice Signal | p. 34 |
Signaling | p. 34 |
Basic Call Processing Sequence | p. 38 |
Other Analog Devices | p. 41 |
Interface Types and Signaling Methods | p. 42 |
Digital Voice | p. 46 |
Transporting Voice | p. 46 |
Digital Voice Signaling | p. 50 |
Voice Compression | p. 52 |
Compression Algorithms | p. 53 |
Comparing the Voice Encoding Techniques | p. 54 |
Factors That Affect Voice Quality | p. 55 |
Compression | p. 56 |
Voice Activity Detection | p. 56 |
Echo | p. 56 |
Delay | p. 59 |
Jitter | p. 60 |
Lost Packets | p. 61 |
Tandem Switching | p. 61 |
Quality of Service for IP Traffic | p. 63 |
Overview | p. 64 |
(Compressed) Real-Time Transfer Protocol | p. 64 |
Configuring CRTP | p. 66 |
Frame-Relay Considerations | p. 67 |
Queuing | p. 70 |
FIFO Queuing | p. 70 |
Priority Queuing | p. 70 |
Custom Queuing | p. 72 |
Weighted Fair Queuing | p. 74 |
PPP Enhancements | p. 77 |
Configuring Multilink PPP and LFI | p. 78 |
Traffic Shaping | p. 80 |
Resource Reservation Protocol | p. 84 |
Signaling | p. 84 |
QoS Types and Queuing | p. 85 |
Implementation Guidelines | p. 85 |
IP Precedence | p. 92 |
IP Precedence with Voice Traffic | p. 93 |
Policy-Based Routing | p. 94 |
Configuring Policy-Based Routing | p. 94 |
Why Did I Set the Precedence Bit? | p. 99 |
Weighted Random Early Detection | p. 100 |
Operation of TCP | p. 101 |
Congestion Collapse | p. 102 |
Synchronization | p. 102 |
RED | p. 104 |
WRED Details | p. 105 |
Configuring WRED | p. 106 |
Quality of Service for Frame Relay | p. 111 |
Introduction | p. 112 |
Frame-Relay Quality of Service | p. 112 |
Class of Service | p. 112 |
Congestion Management | p. 114 |
Router-Based Frame Relay QoS Configuration | p. 116 |
Discard Eligible Tagging | p. 117 |
Generic Traffic Shaping | p. 119 |
Frame-Relay Traffic Shaping | p. 125 |
Generic Traffic Shaping versus Frame-Relay Traffic Shaping | p. 136 |
Priority and Custom Queuing | p. 138 |
Configuring Priority and Custom Queuing | p. 139 |
Challenges for Frame Relay | p. 139 |
Future Alternatives | p. 143 |
Understanding Voice Ports and Dial Peers | p. 145 |
Introduction | p. 146 |
Voice Ports | p. 146 |
Physical Interfaces and Signaling | p. 146 |
Analog Voice Ports | p. 146 |
FXS | p. 146 |
FXO | p. 147 |
EandM | p. 147 |
Configuring Analog Voice Ports | p. 148 |
FXS and FXO Interfaces | p. 148 |
EandM Interfaces | p. 152 |
Additional Voice-Port Parameters | p. 156 |
EandM Siqnaling-Specific Commands | p. 159 |
Digital Interfaces | p. 160 |
Cisco Digital Interface Support | p. 160 |
Configuring PRI Interfaces | p. 161 |
Configuring T1 CAS | p. 162 |
Dial Peers | p. 164 |
Call Legs | p. 165 |
Dial Peers | p. 165 |
POTS Dial Peers | p. 167 |
VoIP Dial Peers | p. 169 |
Finishing the Dial-Peer Statements | p. 170 |
Dial Peer Summary | p. 171 |
Dial-Peer Details | p. 172 |
Important Commands | p. 172 |
Developing a Dial Plan | p. 183 |
Introduction | p. 184 |
Issues Associated with Addressing | p. 184 |
Dial-Plan Organization | p. 184 |
Scaling Issues | p. 185 |
Interior/Exterior Routing | p. 188 |
Dial Plan Building Blocks | p. 192 |
Voice Ports | p. 192 |
Dial Peers | p. 192 |
Creating the Basic Plan | p. 196 |
Voice Network Diagram | p. 196 |
Create a Configuration Table | p. 198 |
Dial Plan Diagram Examples | p. 198 |
Integrating with the External World | p. 204 |
North American Numbering Plan | p. 206 |
Reserved Addresses | p. 206 |
Fitting In | p. 207 |
Corporate Networks | p. 211 |
Addressing Tools | p. 212 |
Number Expansions | p. 212 |
Hunt Groups | p. 214 |
Wildcards | p. 217 |
Integrating It All | p. 219 |
Introduction | p. 220 |
Requirements Analysis | p. 220 |
Information Gathering | p. 221 |
Voice-Traffic Flow Analysis | p. 223 |
QoS Determinations | p. 227 |
Path for Voice Calls | p. 228 |
Voice-Encoding Algorithm | p. 228 |
Router Models | p. 229 |
Processor Utilization | p. 232 |
Packet-Switching Mode | p. 233 |
Layer 2 WAN Transports | p. 233 |
Additional Protocols | p. 237 |
Existing QoS and Queuing Models | p. 241 |
Router Software Versions | p. 243 |
Dial Plan Creation | p. 244 |
Generating the Configuration | p. 244 |
Base Configuration | p. 245 |
Voice Connectivity | p. 251 |
Network Integration | p. 258 |
Security Filters | p. 258 |
Rerouting | p. 259 |
Network Address Translation | p. 260 |
Sample Configurations | p. 261 |
Introduction | p. 262 |
Simple Voice over IP Network | p. 262 |
Network Summary | p. 263 |
Basic Configurations | p. 263 |
Configuration Review | p. 263 |
Simple VoIP Network with Enhancements | p. 269 |
Design Changes | p. 269 |
Configuration Changes | p. 270 |
Complete Configurations | p. 274 |
PBX Trunking | p. 279 |
Design Changes | p. 279 |
Configuration Changes | p. 280 |
Multipoint Frame-Relay Configuration | p. 283 |
Network Summary | p. 283 |
Router Configurations | p. 285 |
Notes on the Multipoint Frame Configuration | p. 297 |
Additional Phone Support and Management Servers | p. 297 |
Design Changes | p. 299 |
Configuration Changes | p. 299 |
VoIP Case Study | p. 305 |
Overview | p. 306 |
Connectivity Requirements | p. 306 |
Network Design | p. 306 |
Materials List | p. 309 |
Network Configuration/Tuning Parameters/Performance | p. 310 |
Appendix | p. 319 |
Index | p. 327 |
Table of Contents provided by Syndetics. All Rights Reserved. |