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dicator of certain kinds of sex discrimination in some countries. For instance, high sex ratios at birth in some Asian countries are now attributed to sex-selective abortion and infanticide due to a strong preference for sons. This will affect future marriage patterns and fertility patterns. Eventually, it could cause unrest among young adult males who are unable to find partners. Suffrage This entry gives the age at enfranchisement and whether the right to vote is universal or restricted. Telephone numbers All telephone numbers in the Factbook consist of the country code in brackets, the city or area code (where required) in parentheses, and the local number. The one component that is not presented is the international access code, which varies from country to country. For example, an international direct dial telephone call placed from the US to Madrid, Spain, would be as follows: 011 [34] (1) 577-xxxx, where 011 is the international access code for station-to-station calls; 01 is for calls other than station-to-station calls, [34] is the country code for Spain, (1) is the city code for Madrid, 577 is the local exchange, and xxxx is the local telephone number. An international direct dial telephone call placed from another country to the US would be as follows: international access code + [1] (202) 939-xxxx, where [ 1] is the country code for the US, (202) is the area code for Washington, DC, 939 is the local exchange, and xxxx is the local telephone number. Telephone system This entry includes a brief general assessment of the system with details on the domestic and international components. The following terms and abbreviations are used throughout the entry: Africa ONE - a fiber-optic submarine cable link encircling the continent of Africa. Arabsat - Arab Satellite Communications Organization (Riyadh, Saudi Arabia). Autodin - Automatic Digital Network (US Department of Defense). CB - citizen's band mobile radio communications. cellular telephone system - the telephones in this system are radio transceivers, with each instrument having its own private radio frequency and sufficient radiated power to reach the booster station in its area (cell), from which the telephone signal is fed to a telephone exchange. Central American Microwave System - a trunk microwave radio relay system that links the countries of Central America and Mexico with each other. coaxial cable - a multichannel communication cable consis
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