[FusionPBX](http://fusionpbx.com/) can be used as a single or domain based multi-tenant PBX, carrier grade switch, call center server, fax server, VoIP server, voicemail server, conference server, voice application server, multi-tenant appliance framework and more. [FreeSWITCH™](http://freeswitch.org) is a highly scalable, multi-threaded, multi-platform communication platform.
It provides the functionality your business needs and brings carrier grade switching, and corporate-level phone system features to small, medium, and large businesses. Read more at [FusionPBX](http://fusionpbx.com/). [Please visit our youtube channel](https://www.youtube.com/FusionPBX)
These options support the project and cover any kind of help you might need from architecture, installation, best practices, troubleshooting, custom feature programming, and training.
1. It protects FusionPBX by you guaranteeing that your contributions are yours to contribute and not the property of an employer or something found on the web.
* [The Quick Way](https://github.com/Fusionpbx/opensource/blob/master/sign-cla.md) - Step by step instructions to contribute to FusionPBX with links to our CLA and how to submit pull requests.
* [The FusionPBX Contribution Site](https://github.com/Fusionpbx/opensource) - The full repo with more information for the curious.
This install script is designed to be an fast, simple, and in a modular way to install FusionPBX. Start with a minimal install of Debian 8 with SSH enabled. Run the following commands under root. The script installs FusionPBX, FreeSWITCH release package and its dependencies, IPTables, Fail2ban, NGINX, PHP FPM and PostgreSQL.
Some installations require special considerations. Visit https://github.com/fusionpbx/fusionpbx-install.sh readme section for more details.