What does a DID Number facilitate in a 3CX setup?

A DID Number, or Direct Inward Dialing Number, is a feature that greatly enhances a 3CX setup by allowing external callers to reach specific extensions directly. This means that when someone dials a DID number associated with a particular user or department, the call is routed straight to that extension without needing to go through a phone tree or operator.

This setup not only improves efficiency for callers but also streamlines communication within an organization. For example, if a customer needs to speak with a particular salesperson or support representative, they can call the specific DID number assigned to that individual, ensuring a faster and more direct connection.

The other options, while related to phone systems, do not accurately capture the primary function of a DID number. Sharing a single phone line among multiple users is a different concept known as a shared line appearance. Connecting video calls to voice calls pertains more to the capabilities of the particular devices or applications in use, rather than the function of DID numbers. Providing a direct line for customer service inquiries could be a use of a DID number, but it doesn't encompass the full scope of what a DID number offers in terms of reaching any specific extension. Thus, the main role of a DID number in a 3CX setup is to facilitate direct