Ensuring Voice Quality
Introduction
In this section, you examine several quality of service (QoS) tools to help you preserve voice quality as voice packets traverse voice-enabled networks. Specifically, you make the following distinctions that affect voice quality:
• Selecting codecs
• Minimizing delay
• Provisioning sufficient bandwidth
• Overcoming jitter
However, you first learn to measure voice quality.
Challenges to Voice Quality
As mentioned earlier in these Quick Reference Sheets, voice quality can be impacted when voice packets are dropped or delayed. Also, variation in the delay (that is, jitter) affects the listener’s perception of the voice quality. The fidelity of a signal is a measure of the frequency range that is represented by ...
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