What is the definition of Dual Service in telecommunications?

The definition of Dual Service in telecommunications refers to a service that offers the same dial tone to multiple locations at once. This means that multiple endpoints can receive calls via the same line, facilitating communication across different physical locations without requiring separate lines for each location. This setup is particularly beneficial in environments where various branches or departments need to be connected efficiently while maintaining a unified communication approach.

In contrast, the other options describe different functionalities. Providing different dial tones for different lines is not characteristic of Dual Service, as it suggests a separation rather than a unification of service. Connecting calls to remote locations does not imply that the locations share the same dial tone, and enabling call forwarding to multiple numbers also does not align with the concept of providing a shared dial tone across different endpoints. Therefore, the focus of Dual Service is specifically on the shared dial tone functionality, which is distinctly characterized by option B.