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  1. FreePBX | Open source, web-based, IP PBX management tool.

    The “Free” in FreePBX stands for Freedom. That’s because FreePBX, the world’s most popular open source IP PBX, gives users the tools to build a phone system tailored to their needs.

  2. IP PBX - Wikipedia

    An IP PBX (“ Internet Protocol private branch exchange ”) is a telephony system that uses Internet Protocol to transmit voice and other communication data. [1][2][3][4][5] Unlike traditional PBX …

  3. What Is a PBX Phone System? Everything You Need To Know

    Jun 18, 2024 · A private branch exchange, or PBX, is a phone system that allows extension phones in one office to connect to the phone network in another office.

  4. What Is a Private Branch Exchange (PBX)? Definition from ...

    Jun 2, 2023 · A private branch exchange (PBX) is a telephone system within an enterprise that switches calls between users on local lines, while enabling all users to share a certain number …

  5. What's a PBX? The different types of PBXs & what to look for.

    A PBX (Private Branch Exchange) phone system is a private telephone network used within an organization. Users within the company can communicate internally and externally (with the …

  6. What Is a PBX Phone System? - Lifewire

    Nov 24, 2024 · A PBX (private branch exchange) phone system allows an organization to manage incoming and outgoing phone calls, as well as internal communication. Learn more about the …

  7. PBX Systems: What you need to know - Webex by Cisco

    PBX stands for Private Branch Exchange. A PBX system is a private internal telephone system that enables internal and external communication.

  8. Home ⋆ Asterisk

    Nov 20, 2025 · Ready to Get Started with Asterisk? Asterisk is a free and open source framework for building communications applications and is sponsored by Sangoma.

  9. What is a PBX? The definitive guide 2025 - VoIPstudio

    Dec 23, 2024 · PBX, “Private Branch Exchange,” represents an organization’s internal communication structure cornerstone. This private telephone network system has significantly …

  10. PBX Phone Systems: Everything You Need to Know | Quo …

    PBX phone systems have been around for decades — but are they right for your business? Find out everything you need to know about PBX systems.