Yealink SIP-T4X Administrator's Manual page 200

Administrator's Guide for SIP-T4X IP Phones
has allocated for the UDP connections to remote parties. The protocol requires
assistance from a third-party network server (STUN server) usually located on public
Internet. The IP phone can be configured to act as a STUN client, sending exploratory
STUN messages to the STUN server. The STUN server uses those messages to determine
the public IP address and port used, and then informs the client.
The NAT traversal and STUN server are configurable on a per-line basis.
Procedure
NAT traversal and STUN server can be configured using the configuration files or locally.
Configuration File
Local
To configure the NAT traversal and STUN server via web user interface:
1. Click on Account.
2. Select the desired account from the pull-down list of Account.
3. Select STUN from the pull-down list of NAT.
4. Enter the IP address or the domain name in the STUN Server field.
184
<MAC>.cfg
Web User Interface
Configure NAT traversal and
STUN server on the IP phone.
For more information, refer to
Network Address Translation
page 355.
Configure the NAT traversal
and STUN server on the IP
phone.
Navigate to:
http://<phoneIPAddress>/servl
et?p=account-register&q=load
&acc=0
on