TP-Link T1600G-18TS Configuration Manual page 186

Configuring 802.1Q VLAN
10 Department-A
20 Department-B
Gi1/0/5, Gi1/0/6, Gi1/0/7, Gi1/0/8,
...
Gi1/0/49, Gi1/0/50, Gi1/0/51, Gi1/0/52
active Gi1/0/2, Gi1/0/4
active Gi1/0/3, Gi1/0/4
Configuration Example
Configuration Guide 163