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This chapter presents a logical and methodological approach for testing, troubleshooting, and supporting VoIP. Troubleshooting VoIP is challenging, especially if the efforts are not structured. In order to successfully troubleshoot a VoIP, one needs thorough understanding of the steps and commands necessary to configure VoIP. This chapter discusses different tools and techniques needed to begin troubleshooting and supporting a VoIP configuration. This chapter uses the Open Systems Interconnection (OSI) model to guide VoIP troubleshooting. The OSI model provides a framework for developing and deploying network protocols, layer by layer. The OSI model itself is not a network protocol or stack such as TCP/IP or AppleTalk, but a model for developing network protocols. Its primary mission is to guide the development efforts by providing a logical structure. Each of the seven layers governs a particular aspect of networking. |
