Chapter 10 The VoIP Account Screens
MAX318M2W User’s Guide
141
In the following example, you want to use client device A to call someone who is
using client device C.
1
The client device (A in the figure) sends a call invitation to the SIP proxy server
(B).
2
The SIP proxy server forwards the call invitation to C.
Figure 67
SIP Proxy Server
STUN
STUN (Simple Traversal of User Datagram Protocol (UDP) through Network
Address Translators) allows the WiMAX Device to find the presence and types of
NAT routers and/or firewalls between it and the public Internet. STUN also allows
the WiMAX Device to find the public IP address that NAT assigned, so the WiMAX
Device can embed it in the SIP data stream. STUN does not work with symmetric
NAT routers or firewalls. See RFC 3489 for details on STUN.
The following figure shows how STUN works.
1
The WiMAX Device (A) sends SIP packets to the STUN server (B).
2
The STUN server (B) finds the public IP address and port number that the NAT
router used on the WiMAX Device’s SIP packets and sends them to the WiMAX
Device.
3
The WiMAX Device uses the public IP address and port number in the SIP packets
that it sends to the SIP server (C).
Figure 68
STUN
A
C
B
1
2
A
1
2
3
NAT
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Страница 10: ...Contents Overview MAX318M2W User s Guide 10...
Страница 16: ...Table of Contents MAX318M2W User s Guide 16...
Страница 17: ...17 PART I User s Guide...
Страница 18: ...18...
Страница 24: ...Chapter 1 Getting Started MAX318M2W User s Guide 24...
Страница 57: ...57 PART II Technical Reference...
Страница 58: ...58...
Страница 62: ...Chapter 5 System Status MAX318M2W User s Guide 62...
Страница 84: ...Chapter 6 WiMAX MAX318M2W User s Guide 84...
Страница 126: ...Chapter 7 Network Settings MAX318M2W User s Guide 126...
Страница 132: ...Chapter 8 Security MAX318M2W User s Guide 132...
Страница 226: ...Appendix B Setting Up Your Computer s IP Address MAX318M2W User s Guide 226...
Страница 236: ...Appendix C Pop up Windows JavaScript and Java Permissions MAX318M2W User s Guide 236...
Страница 280: ...Appendix E Importing Certificates MAX318M2W User s Guide 280...
Страница 294: ...Index MAX318M2W User s Guide 294...