Press the Menu button.
Using the directional keys (up, down, left, right), scroll to 'Settings' then press the Select button.
Scroll to 'Advanced' then press Select.
input the password of the phone then press Enter.
default is '456'
Scroll to 'Administrative Settings' then press Select.
Scroll to 'Network Configuration' then press Select.
Scroll to 'Ethernet Menu' then press Select.
Scroll to 'VLAN Menu' then press Select.
Scroll to 'VLAN ID'
Press Edit.
Input the VLAN ID numerical value you wish to set.
SUMO uses VLAN 10 for voice communication but this requires your network has VLAN10 enabled as well. Please have your network administrator assist with this if unsure.
Press OK.
Press Back until asked to Save (usually 'Save Config') then press Select.
Press Back until you see 'Exit' then press Select.
The phone will likely reboot.