Do I really need to implement QoS?

Implement QoS on the egress WAN connection (hand-off) if upload bandwidth has the likelihood of being saturated. If not, avoid QoS as it could cause other traffic that is not voice to bottleneck.

For example, a switched network environment typically means that QoS implementation on the LAN would be needed for large campus environments, but would not necessarily be needed for smaller offices.

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