Chapter 11 SIP Account Setup
V500 Series User’s Guide
188
SIP Redirect Server
A SIP redirect server accepts SIP requests, translates the destination address to an IP address
and sends the translated IP address back to the device that sent the request. Then the client
device that originally sent the request can send requests to the IP address that it received back
from the redirect server. Redirect servers do not initiate SIP requests.
In the following example, you want to use client device
A
to call someone who is using client
device
C.
1
Client device
A
sends a call invitation for
C
to the SIP redirect server (
B
).
2
The SIP redirect server sends the invitation back to
A
with
C
’s IP address (or domain
name).
3
Client device
A
then sends the call invitation to client device
C
.
Figure 136
SIP Redirect Server
SIP Register Server
A SIP register server (also known as a registrar server) maintains a database of SIP identity-to-
IP address (or domain name) mapping. The register server checks your user name and
password when you register.
RTP
When you make a VoIP call using SIP, the RTP (Real time Transport Protocol) is used to
handle voice data transfer. See RFC 1889 for details on RTP.
NAT and SIP
NAT (Network Address Translation - NAT, RFC 1631) is the translation of the IP address of a
host in a packet, for example, the source address of an outgoing packet, used within one
network to a different IP address known within another network.
Summary of Contents for V500-T1
Page 2: ......
Page 7: ...Safety Warnings V500 Series User s Guide 7...
Page 8: ...Safety Warnings V500 Series User s Guide 8...
Page 10: ...Contents Overview V500 Series User s Guide 10...
Page 17: ...Table of Contents V500 Series User s Guide 17 Index 289...
Page 18: ...Table of Contents V500 Series User s Guide 18...
Page 24: ...List of Figures V500 Series User s Guide 24 Figure 211 Subnetting Example After Subnetting 275...
Page 29: ...29 PART I Introduction Introduction 31 Hardware 35 Tutorials 45...
Page 30: ...30...
Page 44: ...Chapter 2 Hardware V500 Series User s Guide 44...
Page 60: ...60...
Page 68: ...Chapter 4 Using the LCD Screen V500 Series User s Guide 68...
Page 76: ...Chapter 5 The Phonebook V500 Series User s Guide 76...
Page 102: ...Chapter 6 LCD Menus Basic Settings V500 Series User s Guide 102...
Page 158: ...Chapter 7 LCD Menus Advanced V500 Series User s Guide 158...
Page 160: ...160...
Page 166: ...Chapter 8 Introducing the Web Configurator V500 Series User s Guide 166...
Page 200: ...Chapter 12 Phone Setup V500 Series User s Guide 200...
Page 210: ...Chapter 13 The Phone Book V500 Series User s Guide 210...
Page 211: ...211 PART IV Maintenance and Troubleshooting System 213 Logs 219 Tools 221 Troubleshooting 227...
Page 212: ...212...
Page 234: ...234...
Page 264: ...Appendix B Setting Up Your Computer s IP Address User s Guide 264...
Page 282: ...Appendix E Legal Information V500 Series User s Guide 282...
Page 288: ...Appendix F Customer Support V500 Series User s Guide 288...
Page 294: ...Index V500 Series User s Guide 294...