Final answer:
A dedicated line is a special telephone line used for specific point-to-point communications, also known as a 'hotline'. It provides a direct and secure connection between two points.
Step-by-step explanation:
The special telephone line that is used for specific point-to-point communications, also known as a 'hotline', is called a dedicated line. A dedicated line is a telephone line that is reserved for a specific purpose or organization, and it is not shared with others. It provides a direct and secure connection between two points, ensuring reliable and uninterrupted communication.