Direct Inward Dialing Support. This function is offered by telephone companies with the goal that ATC clients could connect all range of company numbers to one or several lines. The aim is to give a personal number to every employee without having to connect it to a separate phone line. Thus, all telephone traffic can be divided and controlled more efficiently.
Companytel is a italian company created in Rome , specialized in the development and production of telecommunications equipment. It is comprised of specialists in the design and production of data and voice transmission equipment.