The DeNovo Class 5 Fusion is a voice application management platform that provides advanced PBX features like voicemail, unified messaging, conferencing, and web interfaces. It includes features of the DeNovo Class 4 Fusion as well as enhanced admin/user web portals, residential account management, call waiting, call forwarding, three-way conferencing, music on hold, voicemail plus, unified messaging, and E-911 emergency services. The system has easy to use interfaces for administrators, account owners, and users.