XO Communications Inc. represents one of many communication providers that has seen the opportunities in cloud-based telephony and UC and jumped into this arena. Its sole focus has been large businesses, enterprises and telecommunications companies, so it understand customers' needs for reliable, available and secure access to applications and services, anytime, anywhere. The company clearly understands how to work carrier infrastructures to provide proper quality of service to its customers, along with a broad range of telephony and unified communications service offerings. In addition to the traditional market basket of such services, XO also offers backup, data center colocation, Web hosting and hosted Exchange services as well.
For more information, view our tutorial on hosted unified communications and managed service providers.