Cisco Qos Exam Certification Guide: Ip Telephon... Direct

To manage these challenges, Cisco utilizes a standardized set of tools often referred to as the "QoS pipeline":

The variation in the arrival time of packets. High jitter results in robotic or broken audio.

The time it takes for a voice packet to travel from the source to the destination. Excessive delay causes unnatural pauses in conversation.

While voice calls require relatively low bandwidth (e.g., 80 kbps for G.711), this capacity must be guaranteed to prevent drops. The QoS Toolkit