Yealink SIP-T54S Administrator's Manual page 140

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
To configure NAT traversal and STUN server via phone user interface:
Press Menu->Advanced (default password: admin) ->Network->NAT->NAT Status.
1.
Press
2.
field.
Enter the IP address or the domain name of the STUN server in the STUN Server field.
3.
Enter the port of the STUN server in the STUN Port field.
4.
Press the Save soft key to accept the change.
5.
A dialog box pops up to prompt that the settings will take effect after a reboot.
Click OK to reboot the phone.
6.
To configure NAT traversal for a specific account via phone user interface:
Press Menu->Advanced (default password: admin) ->Accounts.
1.
Press
2.
Press
3.
field.
Press the Save soft key to accept the change.
4.
Keep Alive
IP phones can send keep-alive packets to the NAT device for keeping the communication port
open.
Procedure
Keep alive feature can be configured using the following methods.
Central Provisioning
(Configuration File)
Web User Interface
114
or , or the Switch soft key to select the desired value from the NAT Status
or to select the desired account and then press the Enter soft key.
or , or the Switch soft key to select the desired value from the NAT Status
<MAC>.cfg
Configure the type of keep-alive
packets on a per-line basis.
Parameter:
account.X.nat.udp_update_enable
Configure the keep-alive interval on a
per-line basis.
Parameter:
account.X.nat.udp_update_time
Configure the type of keep-alive
packets on a per-line basis.
Configure the keep-alive interval on a
per-line basis.
Navigate to:
http://<phoneIPAddress>/servlet?p=a
ccount-adv&q=load&acc=0