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The main tasks of the Swedish Telecommunications Administration are the telephone, telegraph, and telex services. The staff of the Administration includes about 40 000 persons. About 31/2 million telephones are serviced, Each year 250 000 new telephones are installed. Data transmission is a rapidly expanding new branch of activity. Switching equipment is of the crossbar type, or based on the 500-line switch. Switching equipment of stored-program-controlled semielectronic type is under development. For long distance traffic, coaxial cables and microwave links are used. The Swedish Telecommunications Administration has both resources for technical development and factories for manufacturing telephone sets and switching equipment.