TP-Link T1600G-18TS Configuration Manual page 502

Configuring Voice VLAN
Figure 3-14 Adding Ports to the Voice VLAN
5) Click Save Config to save the settings.
 Configurations for Switch C
1) Choose the menu VLAN > 802.1Q VLAN > VLAN Config and click Create to load the
following page. Create VLAN 10 and add ports 1/0/1-3 as tagged ports to the VLAN.
Click Apply.
Configuration Example
Configuration Guide 479