Yealink SIP-T4X Administrator's Manual page 193

4. Select the desired value (0-7) from the pull-down list of Priority.
5. Click Confirm to accept the change.
A dialog box pops up to prompt that settings will take effect after reboot.
6. Click OK to reboot the IP phone.
To configure the DHCP VLAN discovery via web user interface:
1. Click on Network->Advanced.
2. In the VLAN block, select the desired value from the pull-down list of DHCP VLAN
Active.
3. Enter the desired option in the Option field.
The default option is 132.
Configuring Advanced Features
177