What is the primary function of a private branch exchange (PBX)?

A private branch exchange (PBX) primarily functions to manage multiple phone lines within an organization, allowing it to receive and route multiple calls simultaneously. This technology connects internal telephones to the public switched telephone network (PSTN) and manages incoming and outgoing calls, enabling efficient communication within a company.

While other options mention features that a PBX might offer, such as call routing (which relates to connecting calls to different agents), the central role of a PBX is to ensure that multiple calls can be handled concurrently by the organization. This capability is essential for maintaining smooth communication in busy environments where many calls are coming in at once.

Furthermore, the PBX's management of calls extends beyond just handling multiple calls; it may involve additional features, but its core function remains focused on the simultaneous handling of numerous incoming communications.