High Quality Content by WIKIPEDIA articles! In twentieth century telephone systems, a party line (also multiparty line or Shared Service Line) is an arrangement in which two or more customers are connected directly to the same local loop. Prior to World War II in the United States, party lines were the primary way residential subscribers acquired local phone service. British users similarly benefited from the party line discount.Originally, in order to distinguish one line subscriber from another, operators developed different ringing cadences for the subscribers so that if the call was for the first subscriber to the line, the ring would follow one pattern such as two short rings, if the call was for the second subscriber, the ring would sound another way, such as a short ring followed by a long one, and so on. Other subscribers on the line heard the ring and might listen in.

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