This paper has examined the devices involved in VoIP transmissions, the conditions that could affect their performance and how to create a test environment that is comprehensive enough to reliably assess a VoIP system’s performance under stress. In addition, we have discussed how that performance should be measured, using standards-based methodologies that recognize that the actual perception of users cannot be left out if a true evaluation is to be made. There are many methods currently under discussion by VoIP equipment and service providers for improving quality of service and even providing customers with QOS guarantees. If implemented, these methods should help in improving how conversations in the VoIP environment sound, adding some consistency to quality performance. This is necessary before general business acceptance of outside enterprise intranets will occur. In the final analysis, the success of the industry hinges on the positive perception of human beings using telephones.
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