3CX vs Kerio Operator


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3CX
3CX Phone System for Windows is a software-based IP PBX that replaces a proprietary hardware PBX / PABX. 3CX’s IP PBX has been developed specifically for Microsoft Windows and is based on the SIP standard, making it easier to manage and allowing you to use any SIP phone (software or hardware).
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Kerio Operator
Kerio Operator is a small business phone system. Using VoIP, it simplifies voice communications while offering advanced phone features typically associated with enterprise phone systems like conference calls, call forwarding, call recording, ring groups, office voicemail to email, auto attendant, and call queues.