3CX vs Mitel


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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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Mitel
Mitel provides complete solutions for your business communications needs. Easily stay connected to your customers and employees anytime, anyplace. The Mitel MiVoice business communications platforms provide extensive communication features, robust call control, and support for a wide range of innovative desktop devices and applications.