IP-PBX software is an application designed to manage voice and video phone calls for businesses or call center.
VoIP-PBX software works via Internet and provided by many developers and hosted VoIP providers. Some provide the solution as open source and can be installed on Windows PCs and Mac
Courtesy of 3cx.com
IP-PBX software provides more features than traditional PBX such to mention:
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IP-PBX Device