Yealink SIP-T2 SERIES Administrator's Manual page 754

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
Details of Configuration Parameters:
sip.nat_stun.enable
Description:
Enables or disables the STUN (Simple Traversal of UDP over NATs) feature on the IP phone.
0-Disabled
1-Enabled
Note: If you change this parameter, the IP phone will reboot to make the change take
effect.
Web User Interface:
For SIP-T48G/T46G/T42G/T41P/T40P/T29G/T27P/T23P/T23G/T21(P) E2/T19(P)
E2/CP860:
730
Phone User Interface
Parameters
p=settings-sip&q=load
For SIP VP-T49G:
http://<phoneIPAddress>/servlet?
m=mod_data&p=settings-sip&q=
load
Configure NAT traversal for
account X.
Navigate to:
For
SIP-T48G/T46G/T42G/T41P/T40P/
T29G/T27P/T23P/T23G/T21(P)
E2/T19(P) E2/CP860:
http://<phoneIPAddress>/servlet?
p=account-register&q=load&acc
=0
For SIP VP-T49G:
http://<phoneIPAddress>/servlet?
m=mod_data&p=account-register
&q=load&acc=0
Configure NAT traversal and STUN
server on a phone basis.
Configure NAT traversal for
account X.
Permitted Values
0 or 1
Default
0