A "phone line" is kind of an outdated concept. Even traditional call centers had many numbers carried as digital data over something like a T1 line, and nowada

A "phone line" is kind of an outdated concept. Even traditional call centers had many numbers carried as digital data over something like a T1 line, and nowadays how do you connect a "line" to a call center running VoIP over a business-grade cable modem connection? The "line" is just metadata, like caller ID.