The Grandstream UCM series IP PBX is a full-featured, easy-to-manage IP PBX Appliance designed to bring enterprise-grade features to small-and-medium sized businesses (SMBs) without the need for licensing fees, costs per feature, or any recurring costs. Powered by an advanced hardware platform with robust system resources, the UCM series offers a highly versatile, turnkey solution for converged voice, video, data, and mobility applications, including fax and video surveillance.