Yealink SIP-T48G Administrator's Manual page 173

Parameters
1-Enabled
Note: If you change this parameter, the IP phone will reboot to make the change
take effect.
Web User Interface:
Network->Advanced->VLAN->DHCP VLAN->Active
Phone User Interface:
None
network.vlan.dhcp_option
Description:
Configures the DHCP option from which the IP phone will obtain the VLAN settings.
You can configure at most five DHCP options and separate them by commas.
Note: If you change this parameter, the IP phone will reboot to make the change
take effect.
Web User Interface:
Network->Advanced->VLAN->DHCP VLAN->Option
Phone User Interface:
None
To configure 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.
Configuring Advanced Features
Permitted Values
Integer from 1 to 255
Default
132
161