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Authorized Self-Study Guide Cisco Voice over IP (CVoice) by Kevin Wallace

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Optimizing Voice Quality

Because of the inherent characteristics of a converged voice and data IP network, administrators face certain challenges in delivering voice traffic correctly. This section describes these challenges and offers solutions for avoiding and overcoming them when designing a VoIP network for optimal voice quality.

Factors that Affect Voice Quality

Because of the nature of IP networking, voice packets sent via IP are subject to certain transmission problems. Conditions present in the network might introduce problems such as echo, jitter, or delay. These problems must be addressed with QoS mechanisms.

The clarity, or cleanliness and crispness, of the audio signal is of utmost importance. The listener must be able to recognize ...

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