XO Communications (previously Nextlink Communications) provides managed services and converged Internet Protocol (IP) network services that combine voice, Internet access, and private data networking for small and medium-sized companies, enterprises, national and government accounts. XO delivers services through a mix of fiber-based Ethernet and Ethernet over Copper (EoC). In addition, the company has external network-to-network interface (E-NNI) agreements with traditional carriers and cable companies.

Services include:

Bandwith on Demand | Wide Area Networking | Internet | Etheret | Private Lines | Hosted PBX | VoIP | SIP | Voice | Cloud Computing | Web Hosting | Colocation | Hosted Security | Premises-Based Network Security | Network Transport | VPN | VoIP Origination