Yealink SIP-T54S Administrator's Manual page 138

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
Enter the external IP address in the IP Address field.
3.
Click Confirm to accept the change.
4.
A dialog box pops up to prompt that the settings will take effect after a reboot.
Click OK to reboot the phone.
5.
To configure ICE feature via web user interface:
Click on Network->NAT.
1.
In the ICE block, select the desired value from the pull-down list of Active.
2.
Click Confirm to accept the change.
3.
A dialog box pops up to prompt that the settings will take effect after a reboot.
Click OK to reboot the phone.
4.
To configure NAT traversal for account via web user interface:
Click on Account->Register.
1.
Select the desired account from the pull-down list of Account.
2.
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