Planet Networking & Communication IGSW-24040T User Manual page 180

The page includes the following fields:
Object
 Number of Classes

Port
Figure 4-9-9 Port QoS Configuration Page Screenshot
Description
Configure the number of traffic classes as "1", "2", or "4".
The default value is "4".
The logical port for the settings contained in the same row.
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User's Manual of IGSW-24040T