VoIP Voice and Fax Signal Processing

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VoIP VOICE TESTING

VoIP voice solutions have to work at multiple customer locations in multiple deployments to meet the expectations of the users. To ensure quality, VoIP systems are subjected to several voice quality tests and interoperability conditions. In actual deployment, users usually provide subjective feedback with a possible description based on perception. To cater to several conditions, the solutions have to be tested for several simulated conditions along with deployment-specific infrastructure. The outcome has to result in objective results. Some popular tests for VoIP voice are given in Table 13.1. In this chapter, a high-level overview on the tests and some instruments used for performing these tests are presented. Even for basic VoIP voice tests, several instruments are involved as indicated in Fig. 13.1. This test setup assumes the basic working functionality of the VoIP boxes. The actual tests may include several other boxes to create a reasonably close match to the deployment. The instruments listed in this chapter are for creating an example representation. In general, several instruments are on the market for conducting similar or extended tests.