Jonathan Davidson, James Peters, Brian Gracely1578701686, 9781578701681
Table of contents :
Trademark Acknowledgments……Page 2
Dedications……Page 4
Feedback Information……Page 6
Introduction……Page 7
Audience……Page 8
Features and Text Conventions……Page 9
Part I: PSTN……Page 10
The Beginning of the PSTN……Page 11
Analog and Digital Signaling……Page 13
Digital Voice Signals……Page 15
Local Loops, Trunks, and Interswitch Communication……Page 16
User-to-Network Signaling……Page 18
Network-to-Network Signaling……Page 20
PSTN Services and Applications……Page 22
NANP……Page 23
Drawbacks to the PSTN……Page 24
Telecommunications Deregulation……Page 25
Packet Telephony Network Drivers……Page 26
Standards-Based Packet Infrastructure Layer……Page 27
Open Call-Control Layer……Page 28
H.323……Page 29
SGCP and MGCP……Page 30
SIP……Page 31
New PSTN Network Infrastructure Model……Page 32
Summary……Page 33
Signaling Treatment……Page 34
Common ET Designs……Page 35
VPN……Page 36
PBX Networks……Page 37
Tie-Lines for PBX Interconnection……Page 39
Summary……Page 40
Direct Current Signaling……Page 41
Loop-Start and Ground-Start Signaling……Page 42
Type I……Page 43
Type II……Page 44
Type III……Page 45
Type IV……Page 46
CAS……Page 47
Analog Trunks……Page 48
Address Signaling……Page 49
Table 3-5. CCITT No. 5 Supervision Signals……Page 51
Supervision Signaling on Analog Trunks……Page 52
Table 3-9. R2 Supervision Signaling on Digital T……Page 53
Feature Support……Page 54
ISDN Access Interfaces……Page 55
BRI……Page 56
Q.931 Call Control Messages……Page 57
Call Setup……Page 59
QSIG Services……Page 60
QSIG Protocol Stack……Page 61
QSIG Basic Call Setup and Teardown Example……Page 62
Summary……Page 63
SS7 Network Architecture……Page 64
Signaling Elements……Page 65
Global Title Translation……Page 66
SCP……Page 67
Signaling Modes……Page 68
Signaling Links and Linksets……Page 69
SS7 Protocol Overview……Page 71
Physical Layer—MTP L1……Page 72
FISU……Page 73
LSSU……Page 74
MSU……Page 75
Network Layer—MTP3……Page 76
SMH……Page 77
Routing Overview……Page 78
Congestion Control……Page 79
SCCP……Page 80
SCCP Connectionless Example……Page 81
ISUP Services……Page 82
Call Setup and Teardown……Page 83
ISUP Call Control Messages……Page 84
TCAP Interfaces……Page 85
Component Portion of TCAP……Page 86
Basic Call Setup and Teardown Example……Page 87
800 Database Query Example……Page 88
Summary……Page 89
Custom Calling Features……Page 90
Integrated Services Digital Network……Page 91
Centrex Services……Page 92
Database Services……Page 93
Summary……Page 94
Key Benefits of VoIP……Page 95
Packet Telephony Call Centers……Page 96
Service Provider Calling-Card Case Study……Page 101
ICW……Page 104
Enterprise Case Study: Acme Corporation……Page 105
Acme’s Convergence Plan and Goals……Page 107
Integration of Voice and Data Networks……Page 108
Summary……Page 109
OSI Reference Model……Page 110
The Network Layer……Page 111
Internet Protocol……Page 112
IP Addressing……Page 113
Distance-Vector Routing……Page 115
EIGRP……Page 116
IP Transport Mechanisms……Page 117
UDP……Page 118
References……Page 119
Handling Delay……Page 120
Jitter……Page 121
What Is PCM?……Page 122
Voice Compression……Page 123
Mean Opinion Score……Page 124
Echo……Page 125
Figure 8-4. Packet Loss with G.729……Page 126
Digital-to-Analog Conversion……Page 127
Figure 8-6. Tandem Switching Hierarchy……Page 128
Figure 8-7. VoIP Tandem Encoding……Page 129
RTP……Page 130
Reliable User Data Protocol……Page 131
Dial-Plan Design……Page 132
Figure 8-10. Calling My Neighbor with Today’s PSTN……Page 133
References……Page 134
QoS Network Toolkit……Page 136
Bandwidth Limitations……Page 137
cRTP……Page 138
Queuing……Page 140
WFQ Caveats……Page 141
Priority Queuing……Page 142
PQ within CB-WFQ (Low Latency Queuing)……Page 143
IP Precedence……Page 144
IP Precedence Caveats……Page 145
Policy Routing……Page 146
RSVP……Page 147
RSVP Caveats……Page 148
IP RTP Priority……Page 149
CAR……Page 150
Traffic Shaping……Page 151
GTS……Page 152
GTS Syntax……Page 153
Fragmentation……Page 154
MCML PPP……Page 155
MCML PPP Syntax……Page 156
IP MTU and MTU……Page 157
POS……Page 158
WRED……Page 159
TCP……Page 160
Cisco Labs’ QoS Testing……Page 161
Summary……Page 163
H.323 Elements……Page 164
Terminal……Page 165
Gateway……Page 166
Gatekeeper……Page 167
H.323 Protocol Suite……Page 168
Gatekeeper Discovery……Page 169
Registration……Page 170
Endpoint Location……Page 171
Call Control Signaling (H.225)……Page 172
Media Control and Transport (H.245 and RTP/RTCP)……Page 174
Call Termination……Page 175
H.323 Call-Flows……Page 176
Summary……Page 179
Network Servers……Page 180
Locating a User……Page 181
Message Headers……Page 182
Message Responses……Page 183
Proxy Server Example……Page 184
Redirect Server Example……Page 185
Summary……Page 186
Session Description Protocol……Page 187
Call Agents……Page 188
Control Functions……Page 189
NotificationRequest……Page 190
DeleteConnection……Page 191
Call-Flows……Page 192
Media Gateway Control Protocol……Page 194
Event Packages……Page 195
EndpointConfiguration……Page 197
DeleteConnection……Page 198
AuditConnection……Page 199
Summary……Page 200
Open Packet Telephony……Page 201
Virtual Switch Controller……Page 203
Cable Head End……Page 204
SS7 Links……Page 205
Connection Control: SGCP/MGCP……Page 206
VSC-Supported Protocols……Page 207
North American Numbering Plan……Page 208
Digit Analysis……Page 209
VSC Implementation……Page 210
Application Check-Pointing……Page 211
Virtual Switch Manager……Page 212
Accounting……Page 213
Summary……Page 214
Dial-Plan Problems……Page 215
PSTN Feature Transparency……Page 217
Cisco’s Dial-Plan Implementation……Page 218
Summary……Page 219
Enterprise Applications and Benefits……Page 220
The Background and Setup of B.A.N.C…….Page 221
Consolidating the Networks……Page 222
Chicago Router Overview……Page 224
London Router Overview……Page 227
Tokyo Router Overview……Page 228
Denver Router Overview……Page 229
BOWIE.net Multiservice Networks……Page 231
Summary……Page 234
Appendix A. ISUP Messages/ Types Formats……Page 235
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