Nat Traversal Settings - D-Link VoiceCenter DPH-125MS User Manual

Section  - Configuration
NAT traversal is a challenge that all Service Providers looking to deliver public IP-based voice service must solve.
The challenge is to provide secure connection to subscribers behind NAT (Network Address Translation) devices and
Firewalls. This IP Phone implements NAT traversal function for solving the Firewall and NAT traversal problems.
STUN:
Simple Traversal of User Datagram Protocol
through Network Address Translators is a
protocol that allows applications to determine
the types of NATs and firewalls that are in
between them and the internet. STUN also
provides the ability for applications to determine
the public IP addresses allocated to them
the NAT.
STUN Domain
Enter the STUN domain name or IP address if
Name/IP Address:
STUN is enabled.
User Defined E n a b l e o r d i s a b l e t h e s e t t i n g s f o r
External IP/Port: configur ing the user defined exter nal
address and port number.
External IP
Select whether you want to use the STUN
Address:
server to get the external IP address or use
UPnP to get the external IP address.
External SIP Port:
Displays the External SIP port number.
External Media
Displays the External media port number.
Port:
UPnP:
Enable or disable universal plug and play devices. Some NAT supports UPnP so STUN is not required and must be disabled.
D-Link DPH-15MS User Manual

NAT Traversal Settings

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