User's Manual Part 2

Section 3 – Configuration
D-Link DSL-2640R User Manual 36
QoS
Quality of Service or QoS assigns a priority level to
data packets to make sure time sensitive network
applications operate smoothly with minimal delay.
QoS enables applications such as VoIP (voice-over
Internet Protocol) or video conferencing to function
well on networks that may have multiple simultaneous
transmissions of many types of data. Since much of
the traffic is not significantly affected by slight
transmission delay, QoS is used to give preference to
traffic that is affected by delay.
QoS implementation on the Router instead uses four
queues that can be mapped to and assigned priority.
QoS protocols supported on the Router include IEEE
802.1p, Differentiated Services Code Point (DiffServ)
weighted scheduling, IP Type of Service (IP ToS) as
well as application specific and VLAN Group QoS
mapping. To implement QoS on the Router, select the
preferred protocol used for QoS and map the priority
scheduling used to the four queues used on the
Router.
To enable QoS, select the QoS: Activated option, and
select the type of QoS mapping used. Use Queue #1
for the lowest priority traffic, and Queue #4 for the
highest priority traffic.