West Corporation is a provider of technology-driven, voice and data solutions. The Company offers clients a range of communications and network infrastructure solutions that help them manage or support critical communications. It operates in two segments: Unified Communications and Communication Services. Unified Communications consists of Conferencing & Collaboration Services and Alerts & Notifications Services. Communication Services includes Automated Services, Emergency Communications Services, Automated Call Processing and Agent-Based Services. During the year ended December 31, 2010, it managed approximately 24 billion telephony minutes and over 115 million conference calls, facilitated over 240 million 9-1-1 calls, and delivered over 720 million notification calls and data messages. In February 2011, the Company acquired Twenty First Century Communications, Inc.