Nortel Networks Corporation designs, develops, engineers, markets, sells, supplies, licenses, installs, services, and supports networking solutions worldwide. It operates in four segments: Carrier Networks, Enterprise Solutions, Metro Ethernet Networks (MEN), and Global Services. The Carrier Networks segment offers wireline and wireless networks to supply mobile voice, data, and multimedia communications services to individuals and enterprises using cellular telephones, personal digital assistants, laptops, soft-clients, and other wireless computing and communications devices. It also provides circuit- and packet-based voice switching products that provide local, toll, long distance, and gateway capabilities for local and long distance telephone companies, wireless service providers, cable operators, and other service providers. The Enterprise Solutions segment offers enterprise communications solutions for businesses in various industries, including healthcare and financial service providers, retailers, manufacturers, utilities, educational institutions, and government agencies. The MEN segment provides carrier ethernet switching, optical networking, and multi-service switching products. The Global Services segment offers network implementation services, including network integration, planning, installation, optimization, and security services; network support services, such as technical support, hardware maintenance, equipment spares logistics, and on-site engineers; network managed services, including services related to the monitoring and management of customer networks, and providing network managed service options; and network application services, such as applications development, integration, and communications-enabled application solutions. Nortel Networks has strategic alliances with Microsoft Corporation; Dell, Inc.; and IBM, as well as joint-venture with LG Electronics, Inc. The company was founded in 1914 and is headquartered in Toronto, Canada.