17 January 1932 by renaming from the People's Commissariat for Posts and Telegraphs of the USSR. Over the years of the pre-World War II five-year plans (1929–1940), there was a rapid development of the Soviet communication system and industry. High-frequency equipment was introduced for long-distance communication. Use of such equipment allowed to transmit three, four, or 12 telephone calls over a pair of wires or 16 telegrams over a single telephone channel. In 1939, construction of a high-frequency three-channel line between Moscow and Khabarovsk (8,600 km) provided dependable communication between the USSR central regions and the Far East. By late 1940, the Moscow Central Telegraph Office had 22 facsimile lines. In 1941, a 12-channel line between Moscow and Leningrad was put into operation that meant the concurrent transmission of 12 telephone calls over a single pair of wires. In the 1930s, the rural (intraraion) telephone communication was first set up. In 1940, it reached 70% of the areas under rural soviets, 76.3% of the sovkhozes, and 9.2% of the kolkhozes. The radio broadcasting network experienced significant expansion. In the early 1930s, the Comintern Radio Station, with a power of 500 kW, was constructed along with a number of other stations with a power of 100 kW each. The receiving network was augmented, while a system for wired broadcasting via rebroadcasting centres was arranged. Regular television programming was initiated in 1939. During the Great Patriotic War of 1941–1945, steady communication was organised between the General Headquarters of the Supreme Command and the fronts. Soviet postal service administered by the People's Commissariat for Communications of the USSR delivered billions of letters via the postal network and the military postal units of the army in the field. Up to 70 million parcels per month were delivered to the Soviet Army front from the rear under extremely difficult and often very dangerous conditions. Because of the war time, almost half the telephone offices became inoperative but were restored soon after the war. By 1948, telephone system capacity and number of installed telephone sets exceeded the prewar level. In the postwar times, mail service had undergone quantitative and qualitative changes. In 1946, the People's Commissariat for Communications of the USSR was transformed into the Ministry of Communications. As a ministry (1946–1991) It was originally set up as an all-Union ministry, and in December 1954 transformed into a Union-Republican one. The Ministry of Communications of the