Yealink SIP-T2 SERIES Administrator's Manual page 716

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
Parameters
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 (1-255)
Phone User Interface:
Menu->Settings->Advanced Settings (default password: admin)
->Network->VLAN->DHCP VLAN->Option
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 (1-255) field.
The default option is 132.
4. Click Confirm to accept the change.
A dialog box pops up to prompt that settings will take effect after a reboot.
5. Click OK to reboot the phone.
To configure DHCP VLAN discovery via phone user interface:
1. Press Menu->Settings->Advanced Settings (default password: admin)
->Network->VLAN->DHCP VLAN.
2. Press or
VLAN field.
694
Permitted Values
, or the Switch soft key to select the desired value from the DHCP
Default