VoIP calls can come in on which type of phone lines?

VoIP (Voice over Internet Protocol) calls are transmitted over internet connections rather than traditional phone lines. While VoIP technology can be used in various contexts, the 'administrative' designation typically refers to systems or services that handle internal communications within an organization, often utilizing VoIP. This means that administrative phone lines can effectively utilize VoIP technology, allowing for efficient communication and integration with other digital services used for organizational purposes.

In contrast, landlines and cellular lines are traditional phone systems that do not inherently operate over internet protocols. While VoIP technology can coexist with these systems in more complex arrangements, they are not categorized as VoIP. Similarly, private lines, which might refer to exclusive services or internal circuits, are not specifically focused on VoIP communication, making 'administrative' the most fitting choice for indicating the type of phone lines that VoIP calls can commonly come in on.