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Telecommunication control unit : ウィキペディア英語版 | Telecommunication control unit
A telecommunication control unit (TCU) was device present in the now outdated mainframe computers of the past that were attached to a multiplexer channel. TCUs freed mainframes from handling the data coming in and out of RS-232 ports. The TCU would support multiple terminals, sometimes hundreds. Many of these TCUs could support RS-232 when it was required, although there were other serial interfaces as well.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Telecommunication control unit」の詳細全文を読む
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