Polycom V500 Administrator's Manual page 28

Administrator's Guide for the V500 System
3 - 12
Setting Description
NAT Configuration Lets you specify whether the system should attempt to
determine the NAT Public WAN Address automatically.
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NAT Public (WAN) Displays the address that callers from outside the LAN use
Address to call your system.
If you chose to configure the NAT manually, enter the NAT
Public WAN Address here. You can obtain this address by
looking at your router configuration or by asking your
network service provider.
NAT is H.323 Specifies that the system is behind a NAT that is capable of
Compatible translating H.323 traffic.
Address Displayed Lets you choose whether to display this system's public or
in Global Directory private address in the global directory.
If the system is behind a NAT that allows HTTP traffic,
select Auto. The system will attempt to automatically
discover the NAT Public WAN Address.
If the system is behind a NAT that does not allow HTTP
traffic or if Auto fails to discover the NAT Public WAN
address, select Manual.
If the system is not behind a NAT or is connected to the
IP network through a Virtual Private Network (VPN),
select Off.
If the system is behind a firewalled NAT router that is
UPnP™ (Universal Plug and Play) certified, select
UPnP.
Many routers used in homes and small businesses
support UPnP NAT traversal. If this is your situation, try
selecting UPnP first. If this selection does not work for
your router, select Auto or Manual.