# Introduction ## About Class4 Version 5 DNL Class 4 Fusion Version 5 is a popular Class 4 switch especially in the United States. This cook book is a mean to help new user to start using our switch. This cookbook is a fast-food type of user manual for users to get started very quickly to deploy and run calls. It provide the most basic setup and some common questions we normally get asked. However, Class 4 is a very huge platform and have more features than what we are covering here. You can check all features from our [user manual](https://doc.denovolab.com/display/CLASv5d2/Welcome+to+Denovo+Class+4) at . --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://v5cookbook.denovolab.com/master.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.