Yealink SIP-T48G Administrator's Manual page 460

Administrator's Guide for SIP-T2_Series_T4_Series IP Phones
applications to operate behind a NAT to discover the presence of the network address
translator, and to obtain the mapped (public) IP address and port number that the NAT
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, to send 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.
Procedure
NAT traversal and STUN server can be configured using the configuration files or locally.
Configuration File
Local
Details of Configuration Parameters:
account.X.nat.nat_traversal
Description:
Enables or disables the NAT traversal for account X.
446
<MAC>.cfg
Web User Interface
Phone User
Interface
Parameters
Configure NAT traversal on a
per-line basis.
Parameters:
account.X.nat.nat_traversal
Configure NAT traversal and STUN
server on a phone basis.
Parameters:
sip.nat_stun.enable
sip.nat_stun.server
sip.nat_stun.port
Configure NAT traversal on a
per-line basis.
http://<phoneIPAddress>/servlet?p
=account-register&q=load&acc=0
Configure NAT traversal and STUN
server on a phone basis.
Navigate to:
http://<phoneIPAddress>/servlet?
p=network-adv&q=load
Configure NAT traversal and STUN
server on a phone basis.
Permitted Values
0 or 1
Default
0