ZyXEL Communications P2000W Benutzerhandbuch

P-2000W_V2 User’s Guide

90

Chapter 12 User Web Configurator Screens

Figure 27   NAT Traversal Configuration

Table 13   NAT Traversal Configuration 

Select Type

Select None if the Prestige is not behind a NAT router or the NAT router is a SIP 

ALG.

Select By Outbound Proxy if  your VoIP service provider has a SIP outbound 

server to handle voice calls. This allows the Prestige to work with any type of NAT 

router. Turn off a SIP ALG on a NAT router in front of the Prestige to keep it from 

retranslating the IP address (since this is already handled by the outbound proxy 

server).

Select STUN if there is a NAT router between the Prestige and the VoIP service 

provider’s SIP server and your VoIP service provider hosts a STUN server. 

Select Fake WAN Address on SIP and RTP to use a NAT router’s public IP 

address and SIP port number in the Prestige’s SIP messages. You must also 

configure the NAT router to forward traffic with this port number to the Prestige.

Outbound Proxy

Outbound Proxy 

Server Address

This field displays the IP address or domain name of your outbound proxy server.

Outbound Proxy 

Server Port

This field displays the port number to access proxy services.

STUN (RFC3489)

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