There’s a reason why  Software-Defined Networking (SDN or SD-WAN) technology was named the most disruptive technology in the 2019 State of Disruption Study conducted by AVANT Communications, a platform for IT decision-making. SD-WAN is considered to be a game-changer in the industry because it allows companies to improve their networks’ performance while reducing costs at the same time.  What would a shift  to SD-WAN entail, and what are the benefits of upgrading your company’s networks to SD-WAN? One Call Communications, your go-to company for telephone systems, explains in this guide.