PABX is a business solution for companies that need many lines for in-house and outside calls. It allows companies to use a single access number that has several extensions. This is cheaper compared to using many landlines linked to the public network.

A company that uses PABX acts like a telephone exchange. PABX automates the switching tasks needed to connect calls between extensions.

That’s the “A” in the acronym. In contrast, traditional PBX needs human switchboard operators to connect phone users.

In a PABX system, each device connected to the exchange has a designated extension number. These devices include desk phones, computer modems, and fax machines.

A PABX system is often owned and administered by the company hosting it. Many call centers and large enterprises use PABX. Common features include auto attendant, call conferencing, call hold, and call transfer.

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