...
Managing your Unified Communications network is easier than expected. A single instance of VoipNow runs on a server and serves multiple client organizations or tenants. A service provider can still deploy multiple VoipNow Professional virtual environments on the same physical machine, even if the software is multi-tenant.
...
The 4PSA flagship solution is VoipNow® Platform, a suite of software applications designed to accelerate Unified Communications adoption by businesses and end-users. The products are built around cloud computing and provide unrivaled performance with the most comprehensive features, massive scalability, and the ultimate in automation.
VoipNow Professional includes an IP PBX and various management systems that make it a completely Unified Communications solution. A product of this kind does not generally have a graphical user interface and editing must be made manually directly on specific files and through command lines. With VoipNow, software installation and administration are performed remotely on a browser interface.
...