ily ISPs, wireless carriers, competitive local exchange carriers, regional phone companies, interexchange carriers, cable companies, and systems integrators. Voice: Voice includes traditional local and long-distance service provided to retail customers and wholesale access to the company’s network and individual network elements provided to competitors. As of December 31, 2012, the company’s wireline subsidiaries served approximately 16 million retail consumer access lines, 14 million retail business access lines, and 2 million wholesale access lines. It also has various integrated voice and data services, such as integrated network connections, which provide customers the ability to integrate access for their voice and data services, the data component of which is included in data revenues. Long distance consists of traditional long distance and international long distance for customers that select the company as their primary long-distance carrier. Long distance also includes services provided by calling card, 1-800 services and conference calling. These services are used in various business applications, including sales, reservation centers, or customer service centers. It also provides wholesale switched access service to other service providers. Voice also includes calling features, fees to maintain wire located inside customer premises, and other miscellaneous voice products. Calling features are improved telephone services available to retail customers, such as caller ID, call waiting, and voice mail. Other: Other includes application management, security service, integration services, customer premises equipment, outsourcing, government-related services, customer information services, and satellite video services. Security services include business continuity and disaster recovery services, as well as premise and network based security products. Customer premises equipment and other equipment sales range from single-line and cordless telephones to digital private branch exchange (PBX) systems. PBX is a private telephone switching system, used by businesses and located on a customer’s premises, which provides intra-premise telephone services, as well as access to its network. OTHER This segment includes the equity income (loss) from the company’s international investments in América Móvil, S.A. de C.V. The company has 47 percent equity interest in YP Holdings LLC. Dispositions In 2012, the company sold its Advertising Solutions segment. Subsidiaries in this segment published Yellow and White Pages directories and sold directory advertising and Internet-based advertising and local search. Research and Development The company has a research agreement with Ericsson. Its research and development expenses were $1,278 million in 2012. Significant Events In June 2013, AT&T, Inc. and International Business Machines Corporation announced a business agreement to deliver a new eCommerce solution that can help retailers provide a consistent shopping experience for customers whether they are shopping online, via a mobile app or in-store. In June 2013, Goal Zero, LLC announced that it is collaborating with AT&T, Inc. and PENSA, to offer an eco-friendly solution to New Yorkers facing the dead-battery dilemma-public solar powered charging stations known as Street Charge. History AT&T Inc. was founded in 1983. The company was incorporated under the laws of the state of Delaware in 1983.