FusionPBX can be used to provide a highly-available single or domain-based multi-tenant VoIP, carrier-grade switch and call center server. It can also be used as a call center server. FreeSWITCH™, a multi-threaded, multiplatform communication platform, is highly scalable. It offers unlimited extensions, voicemail to email, music on hold and call parking. Call queues, phone provisioning, call center, call parking, and call center are all available. It offers the functionality you need and provides corporate-level phone system features for small, medium, and large businesses. It took a lot of time to fix bugs, tighten security, and improve the code. The future release is being worked on. We have made significant progress, and the master branch is now far ahead of the current release in many aspects. We are diligently working to complete the last changes required for this release.