Kyle, a receptionist for a building supply company, recently won an award for saving his company money on their phone system. after being presented with kyle's research, the company changed the way in which it made long-distance phone calls and cut their expenses in this area by 75 percent. the new system the kyle's company most likely adopted was wired communications switching stations voip hdtv

I’d say VOIP.  

VOIP allows users to make phone calls over the internet. This technology converts analogue into digital voice signals. Unlike the traditional way of making telephone calls, VOIP is less costly and is not distance or location dependent. You can call anyone who is 1000 miles or a meter away . It leads to greater financial savings since the initial setup and ongoing costs are generally low than a more traditional phone system.