Allied Telesis AT-S63 - Manual (Page 180)

Chapter 14: Class of Service
180 Section II: Advanced Operations
The CoS Setting for Port page displays a table that contains the
following columns of information:
Port
The port number.
VLAN ID
The VLAN where the port is an untagged member.
Default Priority
The default priority level assigned to ingress untagged packets on this
port.
Override Priority
Whether the priority level in tagged packets should be overridden.
5. Click Close.