Chapter 12 SIP
MAX-200HW2 Series User
s Guide
152
Figure 101
SIP Redirect Server
12.1.5.4 SIP Register Server
A SIP register 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.
12.1.6 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.
12.1.7 NAT and SIP
The ZyXEL Device must register its public IP address with a SIP register server. If there is a
NAT router between the ZyXEL Device and the SIP register server, the ZyXEL Device
probably has a private IP address. The ZyXEL Device lists its IP address in the SIP message
that it sends to the SIP register server. NAT does not translate this IP address in the SIP
message. The SIP register server gets the ZyXEL Device
s IP address from inside the SIP
message and maps it to your SIP identity. If the ZyXEL Device has a private IP address listed
in the SIP message, the SIP server cannot map it to your SIP identity. See
Chapter 10 on page
129
for more information about NAT.
Use a SIP ALG (Application Layer Gateway), Use NAT, STUN, or outbound proxy to allow
the ZyXEL Device to list its public IP address in the SIP messages.
12.1.7.1 SIP ALG
See
Section 10.1.3 on page 131
.
Содержание MAX-200HW2
Страница 5: ...Safety Warnings MAX 200HW2 Series User s Guide 7 This product is recyclable Dispose of it properly...
Страница 6: ...Safety Warnings MAX 200HW2 Series User s Guide 8...
Страница 8: ...Contents Overview MAX 200HW2 Series User s Guide 10...
Страница 18: ...Table of Contents MAX 200HW2 Series User s Guide 20...
Страница 29: ...31 PART I Introduction Getting Started 33 Introducing the Web Configurator 39...
Страница 30: ...32...
Страница 36: ...Chapter 1 Getting Started MAX 200HW2 Series User s Guide 38...
Страница 44: ...Chapter 2 Introducing the Web Configurator MAX 200HW2 Series User s Guide 46...
Страница 45: ...47 PART II Tutorials and Wizard Tutorial 49 Internet Setup Wizard 61 VoIP Wizard 73...
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Страница 74: ...Chapter 5 VoIP Wizard MAX 200HW2 Series User s Guide 76...
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Страница 88: ...Chapter 6 Status Screens MAX 200HW2 Series User s Guide 90...
Страница 116: ...Chapter 8 WAN Setup MAX 200HW2 Series User s Guide 118...
Страница 126: ...Chapter 9 LAN MAX 200HW2 Series User s Guide 128...
Страница 146: ...Chapter 11 VPN Transport MAX 200HW2 Series User s Guide 148...