What is a “traditional” telephone system?

A traditional phone system is also referred to as a legacy system. It runs on a physical box located at the company’s office, and is connected by wires to each individual phone. These premise-based devices are dependent on the number of users and the number of outside lines required to make outbound calls. They also require multiple cards depending on the number of users and telephone lines used. Companies with multiple locations also need multiple physical boxes. If the company grows after the initial purchase, a technician has to manually upgrade the hardware to add new users.