Zoom ADSL X6v - Manual (Page 53)

STUN Settings
This page lets you configure STUN (Simple Traversal of UDP
through NATs), which helps the X6v route VoIP packets through
the NAT firewall.
Setting Description
STUN Enable STUN permits discovery of Network
Address Translation (NAT) mapping. If
your VoIP service uses Outbound
Proxy, disable STUN (your provider will
tell you to do this). Generally, you
should leave STUN enabled (the
default).
STUN Server
Address Enter the Domain Name or IP address
of your VoIP provider's STUN server.
By default, the Zoom STUN server
address is displayed here.
STUN Symmetric
Deterministic
Enable Not applicable.
Save These Settings Click to save your changes to flash
memory.
53 Chapter 4: Setting Up VoIP Service