Yealink SIP-T2 SERIES Administrator's Manual page 762

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
3. Enter the desired TLS SIP port in the TLS SIP Port field.
4. Click Confirm to accept the change.
To configure NAT traversal and STUN server via phone user interface:
1. Press Menu->Settings->Advanced Settings (default password: admin)
->Network->NAT->NAT Status.
2. Press
Status field.
3. Enter the IP address or the domain name of the STUN server in the STUN Server
field.
4. Enter the port of the STUN server in the Port field.
5. Press the Save soft key to accept the change.
The IP phone reboots automatically to make settings effective after a period of time.
To configure NAT traversal for a specific account via phone user interface (take SIP-T23G
IP phones for example):
1. Press Menu->Settings->Advanced Settings (default password: admin) ->Accounts.
2. Press
3. Press
Status field.
4. Press the Save soft key to accept the change.
To configure NAT traversal for IP call via phone user interface (take SIP VP-T49G IP
phones for example):
1. Tap ->Advanced (default password: admin) ->VC Accounts->SIP IP Call.
2. Tap the NAT field and then tap the desired value in the pop-up dialog box.
740
or , or the Switch soft key to select the desired value from the NAT
or to select the desired account and press the Enter soft key.
or , or the Switch soft key to select the desired value from the NAT