3CX Phone System for Windows is a software-based IP PBX that replaces traditional 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). A software-based IP PBX / PABX offers numerous benefits:

• No need for separate phone wiring – phones use computer network
• Easier to install & manage via web-based configuration interface
• A software-based IP PBX is far less expensive than a hardware-based PBX / PABX
• Employees can move offices without requiring any changes in the wiring or IP PBX configuration
• Choose from the many SIP based hardware phones instead of getting locked in with one vendor
• Receive & Make calls via the standard PSTN using VOIP Gateways
• Save on call costs with 'out of the box' configurations for popular SIP / VOIP providers