Port 1 is suggested to be the uplink. Port 1-3 are standard ports. The ports 4 and 5, signed with white numbers on black ground, are “Quality of Service” (
QoS ) ports. Quality of Service, ES-105A/ES-108A only, ensures bandwith-sensitive traffic such as real-time video and VoIP (Voice over IP) get sent first. Connect devices such as an STB (Set Top Box) or VoIP phone to a port that supports
QoS as labelled”.