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Queued Telecommunications Access Method
Queued Telecommunications Access Method (QTAM) is an IBM System/360 communications access method incorporating built-in queuing. QTAM was an alternative to the lower level Basic Telecommunications Access Method (BTAM) access method
== History ==
QTAM was announced by IBM in 1965 as part of OS/360 and DOS/360 aimed at inquiry and data collection. As announced it also supported remote job entry (RJE) applications, called ''job processing'', which was dropped by 1968. Originally QTAM supported the IBM 1030 Data Collection System, IBM 1050 Data Communications System, the IBM 1060 Data Communications System, AT&T 83B2 Selective Calling Stations, Western Union Plan 115A Outstations, and AT&T Teletype Model 33 or 35 Teletypewriters. By 1968 terminal support had expanded to include the IBM 2260 display complex, and the IBM 2740 communications terminal.
QTAM devices were attached to a System/360 multiplexor channel through an IBM 2701 Data Adapter or IBM 2702 Transmission Control. By 1968 support for the IBM 2703 Transmission Control Unit had been added.〔
QTAM was succeeded by TCAM which provided roughly similar facilities, but was not supported under DOS.
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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