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.
unlimited local and long distance calling to anywhere in the US, Canada, China, Mexico City, and 35+ additional international destinations for one low monthly rate