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Telecommunication control unit

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This is an old revision of this page, as edited by Flydpnkrtn (talk | contribs) at 12:59, 19 April 2005 (Creation of new TCU article, based on input from the RS-232 Article). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
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A device present in the now outdated mainframes of the past that were attached to a multiplexer channel.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.

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