terminal concentrator

{{Short description|Hardware device for multiplexing serial terminal connections}}

{{for|the modern software equivalent|Terminal multiplexer}}

Terminal concentrators, also known as terminal multiplexers, were hardware devices used to multiplex multiple serial terminals to a single hardware computer connection. Examples of terminal multiplexers were the IBM 3299{{Cite web |date=2009-06-09 |title=US - IBM Terminal Multiplexer Model 32T |url=https://www.ibm.com/common/ssi/cgi-bin/ssialias?infotype=DD&subtype=SM&htmlfid=897/ENUS3299-32T |access-date=2023-05-07 |website=www.ibm.com |language=en-US}} and the terminal multiplexers made by Gandalf Technologies.