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  1. PBX | Serving the commercial construction industry since 1886.

    As the lead construction industry guidebook in the tri-state area our directory is viewed by over 3,000 companies including Architects, Engineers, Awarding Agencies, and every Member of …

  2. 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.

  3. 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 …

  4. 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 …

  5. What Is a PBX Phone System? - Lifewire

    Nov 24, 2024 · A PBX (private branch exchange) system allows an organization to manage incoming and outgoing phone calls, as well as internal communication. A PBX is made up of …

  6. PBX Phone Systems: Definition, Types & Comparisons | Vonage

    Jun 29, 2025 · PBX stands for Private Branch Exchange — a type of telephone network that’s assigned to (and controlled by) a single entity. You might find a PBX in a hospital, office …

  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. Enterprise Phone System Software | 3CX

    Enterprise IP PBX Phone System Software includes AI Receptionist, AI Transcription & Call Center Reports. Learn more today I 3CX

  9. What Is a PBX (Private Branch Exchange)? Types, Pros & More

    May 20, 2025 · A PBX or Private Branch Exchange is an internal telephone network that connects a business's staff. Today, they're often part of broader cloud-based tools.

  10. 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 …