Delta Electronics DNS SIP Series Manual de usuario descargar pdf (Pagina 52)

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Henning Schulzrinne 1
Columbia University, New York 1
SIP Basics 3
SIP features 5
SIP servers and clients 6
Internet 7
SIP architecture: carrier 9
SLP?, TRIP−GW? 10
SIP: basic operation 12
SIP–DNS interaction 13
SIP operation in proxy mode 14
Basic SIP call 16
100 Trying 17
180 Ringing 17
SIP – more detail 18
Invitation modes 19
Proxy and redirect servers 20
SIP requests and responses 21
SIP protocol request 22
SIP requests 23
SIP URLs 24
SIP Protocol Design 25
SIP protocol design 26
“Internet binary” 28
Jini/RMI, Corba, DCOM 28
Protocol design: ASN.1 30
Protocol design: textual 31
RPC: RMI, Corba, DCOM 32
Summary: SIP and Corba 33
SIP Details 34
SIP syntax 35
SIP methods 37
SIP response codes 38
To: logical call destination 41
From: call source 41
CSeq: request within call leg 41
Tagging To 42
SIP request routing 43
SIP response routing 44
Via header before forwarding 45
Expires limits search time 45
Forcing request paths 47
Record-Route and Route 48
Call and caller identiﬁcation 51
Content description 52
SIP message size 53
SIP extensions: new methods 55
SIP headers 56
Inquiring about capabilities 58
SIP reliability: INVITE 60
SIP state transition – server 61
SIP state transition – client 62
SIP Registration and User 65
Location 65
REGISTER 66
REGISTER example 67
User requests contact list 68
SIP message body 71
Session description: SDP 73
Security 77
SIP authentication 78
Basic authentication 79
Digest authentication 80
PGP authentication 82
PGP encryption 84
Anonymous calls 85
SIP billing/charging 89
SIP Caller Preferences 90
Preferences 91
Extended SIP Contact header 92
Contact example 93
Request-Disposition 95
SIP Protocol Status and 96
Implementations 96
SIP implementations 98
On-going SIP Implementations 99
SIP server implementation 102
“Active Phone Networks” 103
CPL example 104
Internet phone “appliance” 105
Columbia e*phone 106
SIP Services 108
SIP services 109
Signaling event notiﬁcation 110
SIP “fan-out” 111
Branching requests 112
Parallel search with CANCEL 113
INVITE [email protected] 114
IN call forwarding features 115
IN call handling features 116
SIP advanced services 117
Building advanced services 118
URL = conference-id@mcu-host 120
Replaces =“inverse”Also 123
SIP user location 124
Camp-on service 128
Outgoing call handling 129
SIP and H.323 131
SIP – H.323 Comparison 132
SIP and H.323 elements 133
H.323 Resource Reservation 134
SIP vs. H.323: Call Setup 135
CALL PROCEEDING 136
ALERTING 136
Services 137
H.323 vs. SIP: Manageability 141
H.323 vs. SIP: Scalability 142
H.323 vs. SIP: Flexibility 143
Mobility Support Using SIP 144
Overview 145
Mobility in an IP environment 146
Terminal mobility 147
Personal mobility 149
Visiting a remote network 151
Hotel California 152
Getting home services 153
Service mobility 154
SIP Mobility Overview 162
SIP mobility: pre-call 163
SIP Mobility: Mid-call 164
BS serves as default router 166
Handoff Performance 168
Open Issues 169
Conclusion 170
Programming SIP Services 171
Programming SIP services 172
Programming services 173
Perl, Tcl, VB scripts 174
Examples 175
Cgi Example: Call Forwarding 178
The Call Processing Language 180
Features: 181
Safe to run in servers 181
Abstract structure 182
Abstract structure (cont) 183
Textual representation 184
Switch nodes 187
Address Switches: address 188
String Switches: string 189
Time switches: time 190
Time switches: examples 191
Location nodes 193
Location lookup nodes: lookup 195
Signalling Actions: proxy 197
Signalling Actions: redirect 198
Signalling Actions: reject 199
Non-signalling action: mail 200
Non-signalling action: log 201
Subactions 202
Example: Call Screening 205
Example: Time-of-day Routing 206
Example: Non-call Actions 207
SIP Future 208
What is SIP good at? 209
What is SIP not meant for? 210
SIP and Corba 211
Current SIP efforts 212
Other SIP Uses 213
Summary and Conclusion 215

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