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Chain broadcasting
Chain Broadcasting is the act of connecting two or more radio stations to broadcast the same program at the same time.〔(【引用サイトリンク】first=Thomas H. )〕
==AT&T starts chain broadcasting==
AT&T or American Telephone and Telegraph started the first radio network with the ability to link radio stations through telephone lines. To begin with, AT&T owned the network WEAF in New York City. AT&T started the network in 1921 due to its interest in testing the development of radio technology. The station had a variety of regularly scheduled programs which included sponsorships (not called advertising at the time). Due to the great success of WEAF, many other stations across the US longed to "chain" the programming. Thus, AT&T began sharing programs across stations.〔(【引用サイトリンク】first=James )〕
The Radio Corporation of America or RCA, in an effort to compete, started modeling AT&T’s network idea, but this proved difficult because RCA had to lease the phone lines from AT&T ultimately creating a conflict of interest. The Federal Trade Commission intervened and charged AT&T with anti-trust violations. AT&T recanted the idea.
AT&T decided to promote its most profitable business, telephones, and in 1926, AT&T sold their broadcasting interests to RCA. At the time, RCA was the only real competition. RCA purchased the network with the agreement to lease AT&T’s phone lines. Only one other competitor, Western Union telegraph company, used the network scheme with a downgraded quality.〔Perry, Stephen D. (2004). A Consolidated History of Media (4th edition). Bloomington, IL: Epistelogic〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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