Round-robin queuing, also called custom queuing, sorts data into queues and services each queue in order. An administrator manually configures which type of traffic enters each queue, the queue depth, and the amount of bandwidth to allocate to each queue.

Round-robin queuing is not particularly suited to IP telephony. It does not ensure strict priority to voice packets, so they may still wait behind other traffic flows in other queues. Latency and jitter can be at unacceptable levels.