IvozProvider supports multiple management levels, from Global platform administrator to final user, each of them having its own web interface with visibility to perform configuration tasks.
PBXware Alternatives
PBXware is described as 'The world’s first and most mature IP PBX Professional Open Standards Turnkey Telephony Platform. Bicom Systems’ softswitch is offered in the Business, Call Center and Multi-Tenant Editions' and is a IP PBX system in the social & communications category. There are more than 10 alternatives to PBXware for a variety of platforms, including Linux, Web-based, Windows, SaaS and Mac apps. The best PBXware alternative is Thirdlane Multi Tenant PBX. It's not free, so if you're looking for a free alternative, you could try 3CX or FreePBX. Other great apps like PBXware are Yate - Yet Another Telephony Engine, Thirdlane Business Phone System, XiVO and Acrobits Softphone.