XO Communications is a highly recognized leader in the unified communications industry, by offering their solutions to businesses of all sizes. They are headquartered in Herndon, VA, but they offer their services and their customized solutions throughout the United States, as well as internationally. XO specializes in interactive voice response (IVR), hosted PBX and much more. Contact XO Communications today to learn more on how they can provide your business with the unified communications solutions you need!