What are the two main functions of a PBX system?

What are the two main functions of a PBX system?

• A. To establish a connection between two telephones and maintain it for as long as required without interruption or interference, and to map a dialed number to a physical telephone and ensure that the telephone is not already busy.
• B. To connect to the Internet and manage email
• C. To route calls to the PSTN
• D. To provide wireless access control

Answer: (A)

A PBX serves as the organization’s internal telephone switch, connecting all desk phones and providing access to outside lines when needed. The two main tasks it handles are: first, establishing and maintaining a call between two endpoints inside the system so the conversation stays connected for as long as required; second, interpreting the number that’s dialed (often an extension) and routing that dialed destination to the correct physical phone, while checking that the target line isn’t busy so the call can be completed. This combo of internal call setup and extension-to-endpoint routing is what gives the PBX its core functionality. Other options describe duties that aren’t central to a PBX, such as Internet/email services or wireless access control.

A PBX serves as the organization’s internal telephone switch, connecting all desk phones and providing access to outside lines when needed. The two main tasks it handles are: first, establishing and maintaining a call between two endpoints inside the system so the conversation stays connected for as long as required; second, interpreting the number that’s dialed (often an extension) and routing that dialed destination to the correct physical phone, while checking that the target line isn’t busy so the call can be completed. This combo of internal call setup and extension-to-endpoint routing is what gives the PBX its core functionality. Other options describe duties that aren’t central to a PBX, such as Internet/email services or wireless access control.