# PortSIP ONE Desktop App The **PortSIP ONE app** is compatible only with **PortSIP PBX version 22.0 or later**.\ It does **not** support PortSIP PBX version **16.x**. PortSIP ONE is a versatile unified communications app that allows you to manage your business communications from your **desktop computer**, **web browser**, or **mobile device**. Using a single application, you can: * Make and receive voice calls * Send and receive text messages * Participate in group chats and share information with colleagues and contacts * View customer contact history * Configure and manage call forwarding * Access voicemail messages * View CRM data and AI-generated call transcriptions All communication and collaboration features are delivered through one secure, integrated platform. *** ### Why PortSIP ONE The all-new PortSIP ONE app is designed to be **simple, secure, and flexible**, enabling you to call, message, meet, and get work done efficiently: * **Brings people together** to collaborate and deliver exceptional work * **Adapts to you**, with a personalized user experience * **Gives you flexibility**, allowing you to choose how and where you work * **Integrates seamlessly** with CRM systems and AI transcription features *** ### Download and Installation To download the latest version of **PortSIP ONE for Windows**, visit the [PortSIP website](https://www.portsip.com/portsip-one). * The Windows desktop app is provided as an MSI installer. * Double-click the downloaded MSI file and follow the on-screen instructions to complete the installation. *** > ❗**Note**\ > This guide applies to both **PortSIP ONE for Windows (desktop)** and **PortSIP ONE WebRTC (browser-based)**. --- # 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://support.portsip.com/apps-guides/portsip-one-desktop-app.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.